About Us
For over 25 years, Quarter Master Industries has been the leader in high quality, high performance racing clutches and driveline components. Being
one of the first manufactures in the racing industry to adopt CAD engineering and CNC machining, we continue to stay ahead of the competition by
applying the same progressive philosophy to all of our products year after year. Our dedication to innovation and advanced technology has enabled
us to use tools such as SolidWorks® 3D Engineering Modeling Software, ANSYS® Finite Element Analysis (FEA) and Gibbs®-CAM Software to help
supply our customers with the best quality products on the market. With a proven championship list ranging from NASCAR Cup, Busch Grand
National & Craftsman Truck, NASCAR Featherlite Modified Tour, ARCA, MARS, ASA, and IMCA, its no wonder why we are ranked #1. We stand
committed to providing our customers with excellent service, delivery and technical support. We back our commitment up with a nationwide
distributor network that keeps our products available when and where you need them.
Race Winning Products & Services
Clutch Units
I N T R O D U C T I O N
Quarter Master has been providing winning clutch systems to champions in all forms of racing for over 25 years. Below are our ‘base’ options,
which can be adapted to just about any flywheel and spline combination. We also welcome the opportunity to create a new combination, or design
and manufacture your “make-to-order” request.
Carbon/Carbon
Optimum-V
V-Drive
Pro-Series
Bellhousing Kits
Quarter Master offers a wide variety of bellhousing kits. Kits are available with Pro Series, V-Drive,
Optimum-V or with Carbon/Carbon clutches. Numerous splines and disk counts are also available. In
addition to these options, the kits can be configured with an aluminum or magnesium bellhousing with
either the Tri-Lite or the Race hydraulic release bearing. Kits are available for many Chevrolet, Ford and
Dodge V-8 applications.
- Reverse Mount Starter Bellhousing
- Clutchless Reverse Mount Starter Bellhousing
- OE Diameter Block Mount Starter Bellhousing
- Steel Bellhousing
Driveline Components
Quarter Master offers an extensive array of driveline components including: flywheels, flexplates & ring
gears; starters, aluminum & steel driveshafts; replacement parts; gears; and much more.
QMI Services
2
Part Maintenance and
Repair Services
Custom, Make-to-Order
Capabilities
We provide continued part maintenance and repair
services including examining all clutch parts and
replacing worn or damaged components.
We also welcome the opportunity to
create a new combination, or design
and manufacture your “make-to-order”
request.
Unmatched Customer Service
We take pride in providing the best Customer
Service in the industry. Our friendly,
knowledgeable staff will make every effort to
help you in anyway they can.
Table of Contents
>
4.5” Bellhousing Kits and Applications
6-7
>
4.5” Clutch Units and Service Parts
8-9
>
5.5” Bellhousing Kits and Applications
10-11
>
5.5” Clutch Units and Service Parts
12-13
>
7.25” Bellhousing Kits and Applications
14-15
>
7.25” Clutch Units and Service Parts
16-17
>
8.5” Clutch Units and Service Parts
18-19
>
10.4” Clutch Units and Service Parts
20
>
Clutchless Bellhousing Kit
21
>
Clutchless Bellhousings & Service Parts
22-23
>
Bellhousings
24-25
>
Button Flywheels and Ring Gears
26-27
>
Flywheels
27
>
Hydraulic & Mechanical Release Bearings
28-29
>
Starters
30
>
Driveshafts
31
>
Drive Flanges and Axle Seals
32
>
6-Spline Midget Quick Change Gears
33
>
10-Spline Standard and Ultra Duty Gears
34-35
>
Moment of Inertia (MOI) vs. Weight
36
>
Torque Capacity & MOI Ratings
37
>
Engineering & Design
38
>
Quality Assurance & Warranty
39
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
C O N T E N T S
4-5
O F
High Performance Racing Clutches Overview
T A B L E
>
3
WARNING!
Race applications are not recommended for street use due to aggressive engagement.
Quarter Master has been providing winning clutch systems to champions in all forms of racing for over 25 years. Quarter Master offers an array of high
performance racing clutches that can be adapted to just about any flywheel and spline combination. We also welcome the opportunity to create a new
combination, or design and manufacture your “make-to-order” request. Please call our friendly and experienced staff to help you develop the clutch
setup that will lead you into the winner’s circle.
Carbon/Carbon
C L U T C H E S
Quarter Master’s Carbon/Carbon clutches offer the best and latest in clutch technology. Quarter Master’s
Carbon/Carbon clutches are extremely lightweight, have a low inertia and high torque capacity, making them
suitable in most racing applications.
NEW Carbon Technology!
*Available in: 4.5” (114mm) 5.5” (140mm) and 7.25” (185mm)
*Applications: Open Wheel, Road Racing, Circle Track, Drag
P E R F O R M A N C E
Racing, Rally, Off-Road Racing
Optimum-V
H I G H
R A C I N G
CARBON CLUTCH TECHNOLOGY:
• Extreme heat tolerance
• Exceptionally Lightweight
• Lowest moment of inertia (MOI)
• Smoothest engagement
• Extremely High torque capacity
Our Lightest and Best Metallic Clutch!
Quarter Master’s OPTIMUM-V series provides ultimate performance for circle track applications, and
the 7.25” has won the most prestigious Nextel Cup, Busch Grand National, Craftsman Truck and
Pro-Cup Races since its introduction in 2003. This is the lightest weight and lowest inertia metallic
clutch available. The OPTIMUM-V is an enhanced open style clutch with reduced mass in the legs,
pressure plate, and floater plate, resulting in a lower moment of inertia.
OPTIMUM-V FEATURES:
• Grooved pressure and floater plates for cleaner and cooler running
• Stiffer cover design
• Extremely high torque capacity
• Lower moment of inertia
*Available in: 4.5” (114mm), 5.5” (140mm), and 7.25” (185mm)
*Applications: Circle Track, Road Racing
4
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
WARNING!
Race applications are not recommended for street use due to aggressive engagement.
V-Drive
Quarter Master’s V-Drive clutches feature a one-piece billet aluminum cover with an open leg
design providing a low moment of inertia, and clean and cool running.
Excellent Economical and
Lightweight Choice
*Available in: 4.5” (114mm), 5.5” (140mm), and 7.25” (185mm), and 8.5” (215mm)
*Applications: Circle Track, Road Racing, Rally, Off-Road Racing
H I G H
V-DRIVE FEATURES:
• Open design allowing clean and cool running
• High torque capacity
• Solid and durable design
P E R F O R M A N C E
Quarter Master’s Pro Series clutches are known in the racing world for their years of reliable
performance and durability.
PRO-SERIES FEATURES:
• Solid design and time-tested performance
• High torque capacity
• Available in Aluminum or Steel covers (5.5” and 7.25”)
C L U T C H E S
This Long-Lasting Design Has Been
Quarter Master’s Mainstay for Decades
R A C I N G
Pro-Series
*Available in: 4.5” (114mm), 5.5” (140mm), 7.25”
*Applications: Road Racing, Circle Track, Salt Flats
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
5
APPLICATIONS: Late Models, Super Late Models, SCCA, Modifieds, Roadrace
4 . 5 ”
B E L L H O U S I N G
K I T S
&
A P P L I C A T I O N S
Quarter Master offers a wide variety of bellhousing kits using the 4.5" (114mm) diameter clutches.
Kits are available with Pro Series, V-Drive, Optimum-V, or with Carbon/Carbon clutches. Numerous
splines and configurations are also available. In addition to these options the kits can be configured
with an aluminum or magnesium bellhousing with either the Tri-Lite or the floating hydraulic release
bearing.
ALL KITS INCLUDE:
• Reverse starter mount bellhousing
• Clutch assembly with button and ring gear
• Ultra Duty reverse rotation starter
• Hydraulic release bearing
• Flywheel bolt kit (not shown)
• Clutch inlet and bleed line kit
*PLEASE NOTE
Choose between floating hydraulic Release or Tri-lite Bearing.
Available Clutch Assemblies
CLUTCH UNIT
CARBON/CARBON
• High Tolerance to Extreme Heat
• Remarkably Lightweight
• Extremely High Torque Capacity
• Suitable for Most Racing Applications
OPTIMUM-V
• Grooved Pressure and Floater Plates for
Cleaner and Cooler Running
• Stiffer Cover Design
• Extremely High Torque Capacity
• Lower Moment of Inertia (MOI)
V-DRIVE
• Open Design Allowing Clean and Cool
Running
• Low Moment of Inertia (MOI)
• Excellent Friction Material
• Lightweight
• Great Overall Performance and Value
LIGHTWEIGHT!
Magnesium Kit
(25% Lighter Than Aluminum)
• Known for Years of Reliable Performance
and Durability
• Available with Steel or Aluminum covers
• Great for Road Racing, Speedway and
Short Track
*PLEASE NOTE
Part# 15539490
FEATURES
PRO-SERIES
6
Aluminum Kit
See Application Guide Insert for additional part number listings.
Part# 15039490
4.5” Bellhousing Kit Part Numbers
Aluminum
Magnesium
Aluminum
Ford
Dodge
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
15536490
15526490
15536480
15526490
15036490
15026490
15036480
15026480
15536491
15526491
15536481
15526481
15036491
15026491
15036481
15026481
15536490ZZ
15526490ZZ
15536480ZZ
15526480ZZ
15036490ZZ
15026490ZZ
15036480ZZ
15026480ZZ
15536491ZZ
15526491ZZ
15536481ZZ
15526481ZZ
15036491ZZ
15026491ZZ
15036481ZZ
15026481ZZ
15536492
15526492
15536482
15526492
15036492
15026492
15036482
15026482
15536493
15526493
15536483
15526483
15036493
15026493
15036483
15026483
35536490
35526490
35536480
35526490
35036490
35026490
35036480
35026480
35536491
35526491
35536481
35526481
35036491
35026491
35036481
35026481
25536490
25526490
25536480
25526490
25036490
25026490
25036480
25026480
25536491
25526491
25536481
25526481
25036491
25026491
25036481
25026481
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
15538490
15528490
15538480
15528480
15038490
15028490
15038480
15028480
15538491
15528491
15538481
15528481
15038491
15028491
15038481
15028481
15538490ZZ
15528490ZZ
15538480ZZ
15528480ZZ
15038490ZZ
15028490ZZ
15038480ZZ
15028480ZZ
15538491ZZ
15528491ZZ
15538481ZZ
15528481ZZ
15038491ZZ
15028491ZZ
15038481ZZ
15028481ZZ
15538492
15528492
15538482
15528482
15038492
15028492
15038482
15028482
15538493
15528493
15538483
15528483
15038493
15028493
15038483
15028483
35538490
35528490
35538480
35528480
35038490
35028490
35038480
35028480
35538491
35528491
35538481
35528481
35038491
35028491
35038481
35028481
25538490
25528490
25538480
25528480
25038490
25028490
25038480
25028480
25538491
25528491
25538481
25528481
25038491
25028491
25038481
25028481
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
15539490
15529490
15539480
15529480
15039490
15029490
15039480
15029480
15539491
15529491
15539481
15529481
15039491
15029491
15039481
15029481
15539490ZZ
15529490ZZ
15539480ZZ
15529480ZZ
15039490ZZ
15029490ZZ
15039480ZZ
15029480ZZ
15539491ZZ
15529491ZZ
15539481ZZ
15529481ZZ
15039491ZZ
15029491ZZ
15039481ZZ
15029481ZZ
15539492
15529492
15539482
15529482
15039492
15029492
15039482
15029482
15539493
15529493
15539483
15529483
15039493
15029493
15039483
15029483
35539490
35529490
35539480
35529480
35039490
35029490
35039480
35029480
35539491
35529491
35539481
35529481
35039491
35029491
35039481
35029481
25539490
25529490
25539480
25529480
25039490
25029490
25039480
25029480
25539491
25529491
25539481
25529481
25039491
25029491
25039481
25029481
Tri-Lite
Bearing Kits
Floating
Bearing Kits
V-DRIVE
Aluminum
Magnesium
Aluminum
Magnesium
Tri-Lite
Bearing Kits
Floating
Bearing Kits
PRO-SERIES
Aluminum
Magnesium
Aluminum
Magnesium
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
A P P L I C A T I O N S
LS1
&
Late Chevy
K I T S
Early
Chevy
B E L L H O U S I N G
Magnesium
Clutch Unit
Description
4 . 5 ”
Tri-Lite
Bearing Kits
Floating
Bearing Kits
CARBON/CARBON
7
APPLICATIONS: Late Models, Super Late Models, SCCA, Modifieds, Roadrace
Carbon/Carbon
• High Tolerance to Extreme Heat
• Remarkably Lightweight
• Extremely High Torque Capacity
• Suitable for Most Racing Applications
Optimum-V
• Grooved Pressure and Floater Plates for Cleaner
and Cooler Running
• Stiffer Cover Design
• Extremely High Torque Capacity
• Lower Moment of Inertia (MOI)
V-Drive
Pro-Series
• Known for Years of Reliable Performance and Durability
• Available with Steel or Aluminum covers
• Great for Road Racing, Speedway and Short Track
4 . 5 ”
C L U T C H
U N I T S
• Open Design Allowing Clean and Cool Running
• Low Moment of Inertia (MOI)
• Lightweight
• Great Overall Performance and Value
4.5” Clutch and Button Units
Make
Clutch and
Button Unit
Carbon
Optimum-V
V-Drive
Pro-Series
Small Block
Chevy, Pre-86,
2 PC rear main seal
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
26417090
36417090
26417080
36417080
26417190
36417190
26417180
36417180
26430290
36430290
26430280
36430280
26419090
36419090
26419080
36419080
27417090
37417090
27417080
37417080
27417190
37417190
27417180
37417180
27430290
37430290
27430280
37430280
27419090
37419090
27419080
38419080
28417090
38417090
28417080
38417080
28417190
38417190
28417180
38417180
28430290
38430290
28430280
38430280
28419090
38419090
28419080
38419080
29417090
39417090
29417080
39417080
29417190
39417190
29417180
39417180
29430290
39430290
29430280
39430280
29419090
39419090
29419080
39419080
Small Block
Chevy, 86 and
later, 1 PC rear
main seal
Small Block Ford
Small Block Dodge
8
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
4.5" Clutch
packs
See Application Guide Insert for
additional listings of clutch
packs.
PRO-SERIES
Service Parts
Part#
104500-Steel
104504-Aluminum
Clutch Housing
204503-2 disc
304503-3 disc
104501
Pressure Plate
104506
Floater Plate
Bolt Kits for
204508-2 disc
Button Assembly
304508-3 disc
New Spec.
Min. Spec. Max Warp Spec
Clutch Cover
.885-Pro
1.170-Pro
0.498
0.180
0.493
0.177
0.005
0.005
104504
Cover
104506 Floater Plate
104501 Pressure Plate
304503 Housing (3-Disc)
V-DRIVE
Service Parts
204400-2 disc
304400-3 disc
103501
103506
204508-2 disc
304508-3 disc
0.498
0.180
Part#
New Spec.
213504
313504
413504
113501
113506
0.498
0.180
Min. Spec. Max Warp Spec
0.493
0.177
103506
Floater Plate
0.005
0.005
103501 Pressure Plate
304400 Cover (3-Disc)
Service Parts
Cover Assembly 2d
Cover Assembly 3d
Cover Assembly 4d
Pressure Plate
Floater Plate
P A R T S
OPTIMUM-V
Min. Spec. Max Warp Spec
0.493
0.177
S E R V I C E
Pressure Plate
Floater Plate
Bolt Kits for
Button Assembly
New Spec.
4 . 5 ”
Cover Assembly
Part#
113506
Floater Plate
0.005
0.005
113501 Pressure Plate
313504 Cover (3-Disc)
CARBON/CARBON
Application
Ford, Hewland
Ford, Porsche
Chevy, BMW
Chevy Hewland, T101
Ford, Porsche
Chevy, BMW
Chevy Hewland, T101
*PLEASE NOTE
Spline
Disc
Drive Hub
Pressure Plate
7/8X20
1X23
1-1/8X10
1-5/32X26
1X23
1-1/8X10
1-5/32X26
2
2
2
2
3
3
3
204041
204063
204080
204090
304063
304080
304090
164501
164501
164501
164501
164501
164501
164501
See Application Guide Insert for additional part number listings.
Floater Plate
Outside Thin
164500
164500
164500
164500
164500
164500
164500
Floater Plate
Inside Thick
164500
164500
164500
164500
164500
164500
164500
Clutch
Disc
164726
164726
164726
164726
164726
164726
164726
Shim
Kit
164600
164600
164600
164600
164600
164600
164600
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
9
APPLICATIONS: Late Models, Super Late Models, SCCA, Modifieds, Roadrace
Motor Mount
sold separately
Part# 110515
5 . 5 ”
B E L L H O U S I N G
K I T S
&
A P P L I C A T I O N S
Quarter Master offers a wide variety of bellhousing kits using the 5.5" (140mm) diameter clutches.
Kits are available with Pro Series, V-Drive, Optimum-V or Carbon/Carbon clutches. Numerous splines
and configurations are also available. In addition to these options the kits can be configured with an
aluminum or magnesium bellhousing with either the Tri-Lite or the floating hydraulic release
bearing.
ALL KITS INCLUDE:
• Reverse starter mount bellhousing
• Clutch assembly with button and ring gear
• Ultra Duty reverse rotation starter
• Hydraulic release bearing
• Flywheel bolt kit (not shown)
• Clutch inlet and bleed line kit
*PLEASE NOTE
5.5” Optimum Kit
Part# 150375091
Choose Magnesium or Aluminum bellhousing and either the Floating Hydraulic
Release or Tri-Lite Bearing.
Available Clutch Assemblies
CLUTCH UNIT
5.5” Carbon/Carbon Kit
Part# 15536791
FEATURES
CARBON/CARBON
• High Tolerance to Extreme Heat
• Remarkably Lightweight
• Extremely High Torque Capacity
• Suitable for Most Racing Applications
OPTIMUM-V
• Grooved Pressure and Floater Plates for Cleaner
and Cooler Running
• Stiffer Cover Design
• Extremely High Torque Capacity
• Lower Moment of Inertia (MOI)
V-DRIVE
*Ring Gear not shown
5.5” V-Drive Kit
Part# 15538591
• Open Design Allowing Clean and Cool Running
• Low Moment of Inertia (MOI)
• Lightweight
• Great Overall Performance and Value
PRO-SERIES
• Known for Years of Reliable Performance
and Durability
• Available with Steel or Aluminum covers
• Great for Road Racing, Speedway and Short Track
*Ring Gear not shown
5.5” Pro-Series Kit
10
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Part# 15539591
5.5” Bellhousing Kit Part Numbers
Aluminum
Magnesium
Aluminum
Magnesium
Ford
Dodge
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
155367090
155267090
155367080
155267080
150367090
150267090
150367080
150267080
155367091
155267091
155367081
155267081
150367091
150267091
150367081
150267081
155367090EB
155267090EB
155367080EB
155267080EB
150367090EB
150267090EB
150367080EB
150267080EB
155367091EB
155267091EB
155367081EB
155267081EB
150367091EB
150267091EB
150367081EB
150267081EB
155367092
155267092
155367082
155267082
150367092
150267092
150367082
150267082
155367093
155267093
155367083
155267083
150367093
150267093
150367083
150267083
355367090
355267090
355367080
355267080
350367090
350267090
350367080
350267080
355367091
355267091
355367081
355267081
350367091
350267091
350367081
350267081
255367090
255267090
255367080
255267080
250367090
250267090
250367080
250267080
255367091
255267091
255367081
255267081
250367091
250267091
250367081
250267081
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
155375090
155275090
155375080
155275080
150375090
150275090
150375080
150275080
155375091
155275091
155375081
155275081
150375091
150275091
150375081
150275081
155375090EB
155275090EB
155375080EB
155275080EB
150375090EB
150275090EB
150375080EB
150275080EB
155375091EB
155275091EB
155375081EB
155275081EB
150375091EB
150275091EB
150375081EB
150275081EB
155375092
155275092
155375082
155275082
150375092
150275092
150375082
150275082
155375093
155275093
155375083
155275083
150375093
150275093
150375083
150275083
355375090
355275090
355375080
355275080
350375090
350275090
350375080
350275080
355375091
355275091
355375081
355275081
350375091
350275091
350375081
350275081
255375090
255275090
255375080
255275080
250375090
250275090
250375080
250275080
255375091
255275091
255375081
255275081
250375091
250275091
250375081
250275081
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
15538590
15528590
15538580
15528580
15038590
15028590
15038580
15028580
15538591
15528591
15538581
15528581
15038591
15028591
15038581
15028581
15538590EB
15528590EB
15538580EB
15528580EB
15038590EB
15028590EB
15038580EB
15028580EB
15538591EB
15528591EB
15538581EB
15528581EB
15038591EB
15028591EB
15038581EB
15028581EB
15538592
15528592
15538582
15528582
15038592
15028592
15038582
15028582
15538593
15528593
15538583
15528583
15038593
15028593
15038583
15028583
35538590
35528590
35538580
35528580
35038590
35028590
35038580
35028580
35538591
35528591
35538581
35528581
35038591
35028591
35038581
35028581
25538590
25528590
25538580
25528580
25038590
25028590
25038580
25028580
25538591
25528591
25538581
25528581
25038591
25028591
25038581
25028581
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
3 disc 26 spline
2 disc 26 spline
3 disc 10 spline
2 disc 10 spline
15539590
15529590
15539580
15529580
15039590
15029590
15039580
15029580
15539591
15529591
15539581
15529581
15039591
15029591
15039581
15029581
15539590EB
15529590EB
15539580EB
15529580EB
15039590EB
15029590EB
15039580EB
15029580EB
15539591EB
15529591EB
15539581EB
15529581EB
15039591EB
15029591EB
15039581EB
15029581EB
15539592
15529592
15539582
15529582
15039592
15029592
15039582
15029582
15539593
15529593
15539583
15529583
15039593
15029593
15039583
15029583
35539590
35529590
35539580
35529580
35039590
35029590
35039580
35029580
35539591
35529591
35539581
35529581
35039591
35029591
35039581
35029581
25539590
25529590
25539580
25529580
25039590
25029590
25039580
25029580
25539591
25529591
25539581
25529581
25039591
25029591
25039581
25029581
Tri-Lite
Bearing Kits
Floating
Bearing Kits
OPTIMUM-V
Aluminum
Magnesium
Aluminum
Magnesium
Tri-Lite
Bearing Kits
Floating
Bearing Kits
V-DRIVE
Aluminum
Magnesium
Aluminum
Magnesium
A P P L I C A T I O N S
LS1
&
Late Chevy
K I T S
Early
Chevy
B E L L H O U S I N G
Clutch Unit
Description
5 . 5 ”
Tri-Lite
Bearing Kits
Floating
Bearing Kits
CARBON/CARBON
Tri-Lite
Bearing Kits
Floating
Bearing Kits
PRO-SERIES
Aluminum
Magnesium
Aluminum
Magnesium
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
11
APPLICATIONS: Late Models, Super Late Models, SCCA, Modifieds, Roadrace
Carbon/Carbon
• High Tolerance to Extreme Heat
• Remarkably Lightweight
• Extremely High Torque Capacity
• Suitable for Most Racing Applications
Optimum-V
• Grooved pressure and floater plates for cleaner and cooler running
• Stiffer cover design
• Extremely high torque capacity
• Lower Moment of Inertia (MOI)
V-Drive
Pro-Series
• Known for Years of Reliable Performance and Durability
• Available with Steel or Aluminum covers
• Great for Road Racing, Speedway and Short Track
5 . 5 ”
C L U T C H
U N I T S
• Open Design Allowing Clean and Cool Running
• Low Moment of Inertia (MOI)
• Lightweight
• Great Overall Performance and Value
5.5” Clutch and Button Units
Make
Small Block Chevy, Pre-86,
2 PC rear main seal
Small Block Chevy, 86 and
later, 1 PC rear main seal
Small Block Ford
Small Block Dodge
12
*PLEASE NOTE
Clutch and
Button Unit
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
2 Disc 1- 1/8 X 10
3 Disc 1- 1/8 X 10
*PLEASE NOTE
Add “EB” to part# for externally balanced applications.
Carbon/Carbon
Optimum-V
V-Drive
Pro-Series
26717090
36717090
26717080
36717080
26717190
36717190
26717180
36717180
26730290
36730290
26730280
36730280
26719090
36719090
26719080
36719080
27517090
37517090
27517080
37517080
27517190
37517190
27517180
37517180
27530290
37530290
27530280
37530280
27519090
37519090
27519080
37519080
28517090
38517090
28517080
38517080
28517190
38517190
28517180
38517180
28530290
38530290
28530280
38530280
28519090
38519090
28519080
38519080
39517090
39517090
39517080
39517080
39517190
39517190
39517180
39517180
39530290
39530290
39530280
39530280
39519090
39519090
39519080
39519080
See Application Guide Insert for additional part number listings.
5.5" (140mm) Clutch packs
Please see Application Guide Insert for additional listings of clutch packs.
5.5" (114mm) Service Parts
PRO-SERIES
Service Parts
Part#
New Spec.
105500-Steel
105504-Aluminum
Clutch Housing
105503-1 disc
205503-2 disc
305503-3 disc
105501
Pressure Plate
105506
Floater Plate
105508-1 disc
Bolt Kits for
Button Assembly
205508-2 disc
305508-3 disc
Min. Spec. Max Warp Spec
Clutch Cover
0.600-Pro
0.885-Pro
1.170-Pro
0.534
0.180
0.528
0.177
0.006
0.006
105504
Cover
105506 Floater Plate
105501 Pressure Plate
305503 Housing (3-Disc)
Service Parts
Pressure Plate
Floater Plate
Bolt Kits for
Button Assembly
105400-1 disc
205400-2 disc
305400-3 disc
105401
105406
105508-1 disc
205508-2 disc
305508-3 disc
0.534
0.180
Min. Spec. Max Warp Spec
0.528
0.177
105406
Floater Plate
0.006
0.006
305400 Cover
(3-Disc)
105401 Pressure Plate
P A R T S
New Spec.
OPTIMUM-V
Service Parts
Part#
New Spec.
175600-1 disc
275600-2 disc
375600-3 disc
475600-4 disc
175401
Pressure Plate Slotted
175402
Pressure Plate Drilled
175406
Floater Plate Slotted
175407
Floater Plate Drilled
Bolt Kits for
275508-2 disc
Button Assembly
375508-3 disc
Min. Spec. Max Warp Spec
Cover Assembly
.534"
.534"
.180"
.180"
.528"
.528"
.177"
.177"
S E R V I C E
Cover Assembly
Part#
5 . 5 ”
V-DRIVE
175406
Floater Plate
.006"
.006"
.006"
.006"
175401 Pressure Plate
375600 Cover (3-Disc)
CARBON/CARBON
Application
Ford, Hewland
Ford, Porsche
Chevy, BMW
Chevy Hewland, T101
Ford, Porsche
Chevy, BMW
Chevy Hewland, T101
*PLEASE NOTE
Spline
Disc
Drive Hub
Pressure Plate
7/8X20
1X23
1-1/8X10
1-5/32X26
1X23
1-1/8X10
1-5/32X26
2
2
2
2
3
3
3
207041
207063
207080
207090
307063
307080
307090
167501
167501
167501
167501
167501
167501
167501
See Application Guide Insert for additional part number listings.
Floater Plate
Outside Thin
167500
167500
167500
167500
167500
167500
167500
Floater Plate
Inside Thick
167500
167500
167500
167500
167500
167500
167500
Clutch
Disc
167726
167726
167726
167726
167726
167726
167726
Shim
Kit
167600
167600
167600
167600
167600
167600
167600
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
13
APPLICATIONS: Late Models, Hooters Pro Cup, ARCA, NASCAR® : Nextel, Busch,
Craftsman Truck, Weekly Series
Quarter Master offers a wide variety of bellhousing kits using the 7.25" (185mm) diameter clutches. Kits are available with Pro Series, V-Drive,
Carbon/Carbon or Optimum-V clutches. Numerous splines and configurations are also available. In addition to these options the kits can be
configured with an aluminum or magnesium bellhousing with either the Tri-Lite or the floating hydraulic release bearing. For sanctioning bodies that
require a steel bellhousing, kits are available with Quarter Master’s lightweight steel version.
7 . 2 5 ”
( 1 8 5 m m )
C L U T C H
U N I T S
7.25” NASCAR ® COT
Rear Mount Starter
Bellhousing Kit
KIT INCLUDES:
• Reverse starter mount bellhousing
• Clutch assembly with button and ring gear
• Ultra Duty reverse rotation starter
• Hydraulic bearing (Tri-Lite or Floating)
• Flywheel bolt kit (not shown)
• Clutch inlet and bleed line kit.
Part# 157318190
*PLEASE NOTE
Choose Magnesium or Aluminum bellhousing and either the Floating Hydraulic
Release or Tri-Lite Bearing.
Available Clutch Assemblies
CLUTCH UNIT
FEATURES
CARBON/CARBON
• High Tolerance to Extreme Heat
• Remarkably Lightweight
• Extremely High Torque Capacity
• Suitable for Most Racing Applications
7.25” NASCAR® Weekly
Series Kit
KIT INCLUDES:
• Reverse starter mount bellhousing
• Clutch assembly with button and ring gear
• Ultra Duty reverse rotation starter
• Hydraulic bearing (Tri-Lite or Floating)
• Flywheel bolt kit (not shown)
• Clutch inlet and bleed line kit.
OPTIMUM-V
• Grooved Pressure and Floater Plates for Cleaner
and Cooler Running
• Stiffer Cover Design
• Extremely High Torque Capacity
• Lower Moment of Inertia (MOI)
V-DRIVE
• Known for Years of Reliable Performance
and Durability
• Available with Steel or Aluminum covers
• Great for Road Racing, Speedway and Short Track
*PLEASE NOTE
Part# 1072971591
• Open Design Allowing Clean and Cool Running
• Low Moment of Inertia (MOI)
• Lightweight
• Great Overall Performance and Value
PRO-SERIES
14
Part# 15039791
See Application Guide Insert for additional part number listings.
7.25" Optimum-V
kit-OE style
KIT INCLUDES:
• Stock Starter Location Bellhousing
• Clutch Assembly with Flywheel
• Hydraulic bearing (Tri-Lite or Floating)
• Flywheel Bolt Kit (not shown)
• Standard Rotation Starter
• Clutch Inlet and Bleed Line Kit
7.25” V-Drive Steel Bellhousing Kit
KIT INCLUDES:
• Bellhousing for block mounted starter
• Clutch assembly with button and flexplate
• Ultra Duty starter
Part# 432298091
• Hydraulic bearing (Tri-Lite or Floating)
• Flywheel bolt kit (not shown)
• Clutch inlet and bleed line kit
7.25” Bellhousing Kit Part Numbers
Clutch Unit
Description
Early
Chevy
Late Chevy
LS1
Ford
Dodge
2 DISC 26 SPLINE
2 DISC 10 SPINE
3DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPINE
3DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPINE
3DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPINE
3DISC 26 SPLINE
3 DISC 10 SPLINE
15526990
15526980
15536990
15536980
15026990
15026980
15036990
15036980
15526991
15526981
15536991
15536981
15026991
15026981
15036991
15036981
15526990ZZ
15526980ZZ
15536990ZZ
15536980ZZ
15026990ZZ
15026980ZZ
15036990ZZ
15036980ZZ
15526991ZZ
15526981ZZ
15536991ZZ
15536981ZZ
15026991ZZ
15026981ZZ
15036991ZZ
15036981ZZ
15526992
15526982
15536992
15536982
15026992
15026982
15036992
15036982
15526993
15526983
15536993
15536983
15026993
15026983
15036993
15036983
35526990
35526980
35536990
35536980
35026990
35026980
35036990
35036980
35526991
35526981
35536990
35536980
35026991
35026981
35036991
35036981
25526990
25526980
25536990
25536980
25026990
25026980
25036990
25036980
25526991
25526981
25536991
25536981
25026991
25026981
25036991
25036981
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
10429790
10429780
10439790
10439780
10729790
10729780
10739790
10739780
10429791
10429781
10439791
10439781
10729791
10729781
10739791
10739781
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
30229790
30229780
30239790
30239780
30629790
30629780
30639790
30639780
30229791
30229781
30239791
30239781
30629791
30629781
30639791
30639781
20229790
20229780
20239790
20239780
20629790
20629780
20639790
20639780
20229791
20229781
20239791
20239781
20629791
20629781
20639791
20639781
Aluminum
Magnesium
Aluminum
Magnesium
Aluminum
Magnesium
Aluminum
New style Aluminum bellhousing available Just replace 155, 255, 355 with 155, 255, 355
Aluminum
Magnesium
Aluminum
Magnesium
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
15529890
15529880
15539890
15539880
15029890
15029880
15039890
15039880
15529891
15529881
15539891
15539881
15029891
15029881
15039891
15039881
15529890ZZ
15529880ZZ
15539890ZZ
15539880ZZ
15029890ZZ
15029880ZZ
15039890ZZ
15039880ZZ
15529891ZZ
15529881ZZ
15539891ZZ
15539881ZZ
15029891ZZ
15029881ZZ
15039891ZZ
15039881ZZ
15529892
15529882
15539892
15539882
15029892
15029882
15039892
15039882
15529893
15529883
15539893
15539883
15029893
15029883
15039893
15039883
35529890
35529880
35539890
35539880
35029890
35029880
35039890
35039880
35529891
35529881
35539891
35539881
35029891
35029881
35039891
35039881
25529890
25529880
25539890
25539880
25029890
25029880
25039890
25039880
25529891
25529881
25539891
25539881
25029891
25029881
25039891
25039881
2 DISC 26 SPLINE
2DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
2 DISC 26 SPLINE
2 DISC 10 SPLINE
3 DISC 26 SPLINE
3 DISC 10 SPLINE
10429990
10429980
10439990
10439980
10729990
10729980
10739990
10739980
10429991
10429981
10439991
10439981
10729991
10729981
10739991
10739981
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
30229990
30229980
30239990
30239980
30629990
30629980
30639990
30639980
30229991
30229981
30239991
30239981
30629991
30629981
30639991
30639981
20229990
20229980
20239990
20239980
20629990
20629980
20639990
20639980
20229991
20229981
20239991
20239981
20629991
20629981
20639991
20639981
U N I T S
Tri-Lite
Floating
Bearing Kits Bearing Kits
V-DRIVE
C L U T C H
Magnesium
( 1 8 5 m m )
Tri-Lite
Floating
Bearing Kits Bearing Kits
OPTIMUM-V
7 . 2 5 ”
Tri-Lite
Bearing Kits
Floating
Bearing Kits
CARBON/CARBON
Floating
Tri-Lite
Bearing Kits Bearing Kits
PRO-SERIES
Aluminum
Magnesium
Aluminum
Magnesium
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
15
APPLICATIONS: Late Models, Hooters Pro Cup, ARCA, NASCAR® : Nextel, Busch,
Craftsman Truck, Weekly Series
Carbon/Carbon
• High Tolerance to Extreme Heat
• Remarkably Lightweight
• Extremely High Torque Capacity
• Suitable for Most Racing Applications
Optimum-V
• Grooved pressure and floater plates for cleaner and cooler running
• Stiffer cover design
• Extremely high torque capacity
• Lower Moment of Inertia (MOI)
V-Drive
7 . 2 5 ”
C L U T C H
U N I T S
• Open Design Allowing Clean and Cool Running
• Low Moment of Inertia (MOI)
• Lightweight
• Great Overall Performance and Value
Rally
Pro-Series
7.25” Clutch and Button Units
Make
Small Block Chevy,
Pre-86, 2 PC rear main seal
Small Block Chevy,
86 and later, 1 PC rear main seal
Small Block Ford
Small Block Dodge
16
• Known for Years of
Reliable Performance and
Durability
• Available with Steel
or Aluminum covers
• Great for Road Racing,
Speedway and Short Track
*PLEASE NOTE
• Open Style Clutch
• Thicker Friction material
• Rally, Road, and Circle
Track Racing
*PLEASE NOTE
For Rally clutches add (RY) to the
end of the part number. i.e.:
198108RY (Rally Material is .250
thick)
Clutch and
Button Unit
Carbon/Carbon
Optimum-V
V-Drive
Pro-Series
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
3 Disc 1-1/8 X 10
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
3 Disc 1-1/8 X 10
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
3 Disc 1-1/8 X 10
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
3 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
3 Disc 1-1/8 X 10
16917090
26917090
36917090
16917080
26917080
36917080
16917190
26917190
36917190
16917180
26917180
36917180
16930290
26930290
36930290
16930280
26930280
36930280
197158
297158
397158
197108
297108
397108
197153
297153
397153
197103
297103
397103
197358
297358
397358
197308
297308
397308
19719090
29719090
39719090
19719080
29719080
39719080
198158
298158
398158
198108
298108
398108
198153
298153
398153
198103
298103
398103
198358
298358
398358
198308
298108
398308
19819090
29819090
39819090
19819080
29819080
39819080
199158
299158
399158
199108
299108
399108
199153
299153
399153
199103
299103
399103
199358
298358
399358
199308
299308
399308
19919090
29919090
39919090
19919080
29919080
39919080
See Application Guide Insert for additional part number listings.
7.25" Clutch packs
Please see Application Guide Insert for additional listings
of clutch packs.
PRO-SERIES
Service Parts
Part#
Clutch Cover
309500-Steel
309505-Aluminum Super Pro
106503 - 1 disc
206503 - 2 disc Speedway
209503 - 2 disc Short Track
306503 - 3 disc Speedway
309503 - 3 disc Short Track
209501 - 2 disc Mini
209502 - 2 disc
309501 - 3 disc
509506
106507-1 disc
209508-2 disc
309508-3 disc
Clutch Housing
Pressure Plate
Floater Plate
Bolt Kits
for Button Assembly
New Spec.
Min. Spec.
Max Warp Spec
.615-1 disc
.900-2 disc All
.900-2 disc All
1.262-3 disc all
1.262
.534-1 & 2 Mini
.534-2 disc
.605-3 disc
.180
.615-1 disc
.900-2 disc All
.900-2 disc All
1.262-3 disc all
1.262
.528-1 & 2 disc Mini
.528-2 disc
.598-3 disc
0.006
.177
0.006
New Spec.
Min. Spec.
309500 309503
Cover Housing
(steel) (3-Disc)
105506 Floater Plate
309501 Pressure Plate
(3-Disc)
V-DRIVE
Service Parts
Part#
.598 all
0.006
.177
0.006
508506
Floater Plate
OPTIMUM - V
Service Parts
Cover Assembly
Pressure Plate
Floater Plate
Bolt Kits 1 disc Splined NAS Bolts
Bolt Kits 2 disc Splined NAS Bolts
Bolt Kits 3 disc Splined NAS Bolts
New Spec.
Min. Spec.
118500
218500
318500
108506
108508
108505
108507
508507
107507
207507
307507
0.604
0.604
0.604
0.604
0.180
0.599
0.599
0.599
0.599
0.177
Max Warp Spec
0.006
0.006
0.006
0.006
0.006
508507
Floater Plate
P A R T S
1 disc
2 disc
3 disc
1 & 2 disc
1& 2 disc HD
3 disc
3 disc HD
Part#
S E R V I C E
108501 Alum. Fulcrum Only
208500 Cover (2-Disc)
7 . 2 5 ”
208500 - 2 disc
308500 - 3 disc
Pressure Plate
108501 - Alum. Fulcrum Only**
108502 - Rally+1, 2 & 3 disc all .604 all
108503 - 1 & 2 disc Hi Ratio
508506
.180
Floater Plate
106507-1 disc
Bolt Kits
for Button Assembly 209508-2 disc
309508-3 disc
** Must be used with 508506 Floater Plate.
Max Warp Spec
Cover Assembly
108508 Pressure Plate (1 & 2-Disc HD)
318500 Cover (3-Disc)
RALLY
Service Parts
Part#
Cover Assembly
108500RY - 1 disc
308500 - 2 disc
108502
508506
209507 - 1 disc
309507 - 2 disc
Pressure Plate
Floater Plate
Bolt Kits
for Button Assembly
New Spec.
Min. Spec.
.180
.177
Max Warp Spec
0.006
0.006
CARBON-V SERVICE PARTS
Clutch
1 disc
2 disc
3disc
Disc
168726
168726
168726
*PLEASE NOTE
CARBON-V DRIVE HUB
Pressure Plate Floater Plate
Outside Thin
168502
168502
168502
508506 Floater Plate
108502 Pressure Plate
308500 Cover (2-Disc)
168500
168500
168500
Floater Plate
Inside Thick
Cover
Shim Kit
168506
168506
168506
169500
269500
369500
168600
168600
168600
See Application Guide Insert for additional part number listings.
CARBON-V FLYWHEELS
Application
Part#
Application
ford, porsche
chevy hewland t101
chevy,bmw
ford, hewland
308063
308090
308080
308041
chevy
chevy late
ford
chevy externally balanced
Part#
509110SC
509113SC
509311SC
509113SCZZ
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
17
Quarter Master’s 8.5” Extreme-V clutch was created to fill the gap
between a full race clutch and a street clutch.
INCLUDES:
• Clutch and Flywheel Button
Assembly
• Flexplate
• Steel Bellhousing
• Hydraulic Bearing (Tri-Lite or Floating)
• Flywheel bolt kit (not shown)
Part# 432185091LW
8 . 5 ”
B E L L H O U S I N G
K I T
8.5" Extreme-V
Steel
Bellhousing
Kit
18
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
8.5" Extreme-V
Clutch Unit
Quarter Master's Extreme-V series of clutches was created to fill the gap
between a full race clutch and a street clutch. These clutches feature a CNC
machined cover made of billet 6061 T6 aluminum. There are 1 and 2 disk
configurations available to meet a wide range of applications.
Clutches can be ordered in a variety of spline configurations with either solid
or sprung hubs. Friction material choices include:
• ORGANIC
• HEAVY DUTY
• RALLY
C L U T C H
8.5” Extreme Clutch and Button Units
Small Block Chevy,
Pre-86, 2 PC rear main seal
881329001
882329001
881328001
882328001
881339001
882339001
881338001
882338001
881349001
882349001
881348001
882348001
N/A
N/A
N/A
N/A
8813290
8823290
8813280
8823280
8813390
8823390
8813380
8823380
8813490
8823490
8813480
8823480
N/A
N/A
N/A
N/A
Small Block Chevy,
86 and later, 1 PC rear main seal
Small Block Ford
Small Block Dodge
*PLEASE NOTE
P A R T S
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
1 Disc 1-5/32 X 26
2 Disc 1-5/32 X 26
1 Disc 1-1/8 X 10
2 Disc 1-1/8 X 10
S E R V I C E
Sprung Hub RY
&
Solid Hub HD
U N I T
Clutch and
Button Unit
Make
8 . 5 ”
Some popular configurations can also be purchased as a Flexplate Assembly or
a complete Bellhousing Kit. There are also some vehicle-specific applications
available that include either aluminum or lightweight billet steel flywheels.
Buttons with different crankshaft bolt patterns can be made as a Make-to-Order (MTO).
8.5” EXTREME-V SERVICE PARTS
Service Part
Cover Assembly
Pressure Plate
Floater Plate
Bolt Kits
*PLEASE NOTE
Extreme-V
New Spec.
Min. Spec.
Max Warp Spec
212600-1 Disc
312600-2 Disc
112503 Hi Ratio
112504 Standard Ratio
112506
209507 - 1 Disc
305503 - 2 Disc
.784"
.784"
.180
.778"
.778"
1177
.006"
.006"
1006
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
19
Quarter Master's 10.4" Street Stock clutch and flywheel packages were developed for racing classes
where you must run a stock type, single disk clutch.
Available with:
• Steel Faced Aluminum Pressure Plate
• Aluminum Core Friction Disks (organic only)
• Lightweight Steel Flywheels
1 0 . 4 ”
C L U T C H
U N I T S
&
S E R V I C E
P A R T S
These features translate into the lowest possible moment of inertia and deliver a performance increase
you can feel on the track.
20
Clutch and Flywheel Assemblies
With Iron Pressure Plate
Modular Iron Pressure Plate
Organic Friction Disc
Heavy Duty Friction Disc
Solid Hub
Sprung Hub
Solid Hub
Sprung Hub
Chevy 153T 1-1/8x10
Chevy 153T 1-5/32x26
Chevy 153T 1-1/8x10
Chevy 153T 1-5/32x26
Chrysler 130T 1-1/8x10
Chrysler 130T 1-1/8x10
Chrysler 130T 1-5/32x26
Chrysler 130T 1-5/32x26
Ford 157T 1-1/8x10
Ford 157T 1-1/16x10
Ford 157T 1-5/32x26
192100
192150
192102
192152
192200
192201
192250
192251
192300
192310
192350
Early Crank - 2 pc Seal
Early Crank - 2 pc Seal
Late Model - 1 pc Seal
Late Model - 1 Pc Seal
8-Bolt Crankshaft
6-Bolt Crankshaft
8-Bolt Crankshaft
6-Bolt Crankshaft
Not Externally Balanced SBF
Not Externally Balanced SBF
Not Externally Balanced SBF
192105
192155
192106
192156
192205
192206
192255
192256
192305
192315
192355
192110
192160
192111
192161
192210
192211
192260
192261
192307
192320
192360
192115
192165
192116
192166
192215
192216
192265
192266
192309
192325
192365
Clutch and Flywheel Assemblies
With Aluminum Pressure Plate
Aluminum Pressure Plate
Organic Friction Disc
Heavy Duty Friction Disc
Solid Hub
Sprung Hub
Solid Hub
Sprung Hub
Chevy 153T 1-1/8x10
Chevy 153T 1-5/32x26
Chevy 153T 1-1/8x10
Chevy 153T 1-5/32x26
Chrysler 130T 1-1/8x10
Chrysler 130T 1-1/8x10
Chrysler 130T 1-5/32x26
Chrysler 130T 1-5/32x26
Ford 157T 1-1/8x10
Ford 157T 1-1/16x10
Ford 157T 1-5/32x26
191100
191150
191101
191151
191200
191201
191250
191251
191300
191310
191350
Early Crank - 2 pc Seal
Early Crank - 2 pc Seal
Late Model - 1 pc Seal
Late Model - 1 Pc Seal
8-Bolt Crankshaft
6-Bolt Crankshaft
8-Bolt Crankshaft
6-Bolt Crankshaft
Not Externally Balanced
Not Externally Balanced
Not Externally Balanced
191105
191155
191106
191156
191205
191206
191255
191256
191305
191315
191355
191110
191160
191111
191161
191210
191211
191260
191261
191307
191320
191360
191115
191165
191116
191166
191215
191216
191265
191266
191309
191325
191365
10.4" Replacement Discs (by Spline Size)
Organic Friction Disc
Solid Hub
Sprung Hub
Heavy Duty Friction Disc
Solid Hub
Sprung Hub
1-1/8x10 Steel Core
1-1/16x10 Steel Core
1x23 Dodge/Chrysler
1-5/32x26
1-1/8x10 Aluminum Core
1-5/32x26 Aluminum Core
101290
101291
101293
101295
101190
101195
101490
101491
101493
101495
2.9 lbs Organic w/Solid Hub
2.9 lbs Organic w/Solid Hub
2.1 lbs Organic w/Solid Hub
2.1 lbs Organic w/Solid Hub
Service Parts
Part#
28 in-oz Balance Weight for Ford Flywheels with Bolts
50 in-oz Balance Weight for Ford Flywheels with Bolts
Chevy Throw Out Bearing for Mechanical Linkage
Clutch Cover Assembly with Iron Pressure Plate
Clutch Cover Assembly with Steel Faced
Aluminum Pressure Plate
512029
512051
101130
101500
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
101504
101390
101391
101393
101395
101590
101591
101593
101595
Quarter Master had the Racer and Distributor in mind when designing the Clutchless Bellhousing Kit package. Engineers used the latest
computer software to design the lightest and stiffest bellhousing on the market today. This design has eliminated the cracking around the starter
pocket inherent with other bellhousings, and it’s extremely versatile to ease compatibility with your application-specific engine.
C L U T C H L E S S
KITS INCLUDE:
• Bellhousing
• Starter Adapter Plate
• Oil Pump Mount
• 91-Tooth Ring Gear
• Drive Hub
• True Reverse Rotation Starter
• Oil Pump Belt
B E L L H O U S I N G
Part# 11509124TM
K I T S
Outperform your competition
and maintain a winning edge.
These winning drivers already use the Quarter Master
Clutchless Bellhousing Kit, shouldn’t you?
- Rick Eckert
- Bill Frye
- Chris Madden
- Matt Miller
- Terry Phillips
- Jackie Boggs
- Brian Birkhoffer
- and many more!
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
21
Clutchless Reverse Mount Starter
Bellhousing
Quarter Master designs bellhousings to the highest quality to meet the extreme performance demands of dirt track racing. All of our bellhousings
provide exceptional durability, are lightweight, and are designed to ease compatibility with your application-specific engine.
Quarter Master Clutchless Reverse Mount Starter Bellhousings Are:
Lightweight Magnesium
Clutchless Bellhousing
Aluminum Clutchless
Bellhousing
C L U T C H L E S S
B E L L H O U S I N G
K I T S
• Designed to accommodate Top or Side Oil Pump Mounts
• Compatible with Quarter Master’s true reverse rotation starter with 91-tooth flywheel, eliminating need for idler gear components
• Available with Bert/Brinn style Idler and Flywheel
• Lightweight pump brackets tie into the bellhousing for unmatched pump support and strength
• Completely CNC machined to ensure a perfect fit every time
Application
Bellhousing Only (No Mounts) Magnesium
Bellhousing Only (No Mounts) Aluminum
Bellhousing Mag w/QMI Starter Mount
Bellhousing Mag w/ Bert/Brinn Style Starter Mount
Bellhousing AL w/QMI Starter Mount
Bellhousing AL w/ Bert/Brinn Style Starter Mount
22
*PLEASE NOTE
Chevy Early
Chevy Late
Chevy LSX
Ford
Dodge
110115
110120
110115Q
110115B
110120Q
110120B
110115
110120
110115Q
110115B
110120Q
110120B
110115
110120
110115Q
110115B
110120Q
110120B
110315
110320
110315Q
110315B
110320Q
110320B
110215
110220
110215Q
110215B
110220Q
110220B
See Application Guide Insert for additional part number listings.
Clutchless Bellhousing Kit Service Parts
Description
Chevy LSX
Ford
Dodge
Bellhousing Only (No Mounts) Magnesium
Bellhousing Only (No Mounts) Aluminum
Bellhousing Mag w/QMI Starter Mount
Bellhousing Mag w/ Bert/Brinn Style Starter Mount
Bellhousing AL w/QMI Starter Mount
Bellhousing AL w/ Bert/Brinn Style Starter Mount
110115
110120
110115Q
110115B
110120Q
110120B
110115
110120
110115Q
110115B
110120Q
110120B
110115
110120
110115Q
110115B
110120Q
110120B
110315
110320
110315Q
110315B
110320Q
110320B
110215
110220
110215Q
110215B
110220Q
110220B
Starter QMI Style
Starter Bert/Brinn Style
Starter Plate for QMI Starter
Starter Plate for Bert/Brinn Style Starter
Billet Starter Nose
Idler Gear Kit (for Bert/Brinn style starter, includes bracket)
Starter Support Bracket Kit
114267B
114170
114176
114177
114269
114169
114259
114267B
114171
114176
114177
114269
114169
114259
114267B
114172
114176
114177
114269
114169
114259
114267B
114173
114376
114177
114269
114169
114259
114267B
114174
114276
114177
114269
114169
114259
Flywheel Bolt Kit
91t Flywheel
65t Flywheel
505004
509124B
609124
505012
509134B
609134
505019
509136
505014
509323
609323
505004
509224
609224
Drive Hub w/out pump drive gear
Drive Hub w/ pump drive gear
Counter Balance Weight Chevy Crate Motor (91t only)
180123
180131
180125
180134
180171
180126
180323
180331
180223
180231
Oil Pump Bracket Kit, Rocket/Universal Top Mount
Oil Pump Bracket Kit, Stock Car Products Top Mount
Oil Pump Bracket Kit, KSE Top Mount
Oil Pump Bracket Kit, Peterson Side Mount
117600
117602
117603
117500
117600
117602
117603
117500
117600
117602
117603
117530
117600
117602
117603
Oil Pump Belt 720mm x 20mm Top (8mm HTD pitch)
Oil Pump Belt 600mm x 20mm Side (8mm HTD pitch)
117691
117690
117691
117690
117691
117690
117691
117690
B E L L H O U S I N G
Chevy Late
C L U T C H L E S S
Chevy Early
K I T S
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
23
Reverse Mount
Starter Bellhousing
Quarter Master's reverse mount bellhousings are engineered for ultimate
stiffness and are lightweight. They are precision CNC machined for the
best parallelism and concentricity and can be used with either the Tri-Lite or the
Floating hydraulic race bearing. Bellhousings are available for many small block
Chevrolet, Ford, and Dodge V-8 applications in both magnesium and aluminum
versions.
OE diameter block
mount starter
bellhousings
Quarter Master's Championship winning bellhousings
will accommodate some stock diameter flywheels and
block mount starters. They are CNC machined for the best
parallelism and concentricity and can be used with either
the Tri-Lite or the Floating hydraulic race bearings.
Bellhousings are available for many Chevrolet, Ford,
Dodge, and Toyota V-8 applications.
B E L L H O U S I N G S
Part# 110106
Part# 110150
Part# 110355
Clutchless Reverse
Mount Starter
Bellhousing
Quarter Master's clutchless reverse mount bellhousings are engineered for
ultimate stiffness and are lightweight. They are CNC machined for the best
parallelism and concentricity. Bellhousings are available for Chevrolet and Ford
V-8 applications in both magnesium and aluminum versions (Dodge
applications coming in 2007).
Part# 110115
24
*PLEASE NOTE
Part# 110120
See Application Guide Insert for additional part number listings.
Steel
Bellhousing
Quarter Master's lightweight steel bellhousing is
designed for racing classes that require a steel
bellhousing. They can be used with the Tri-Lite or the
Floating hydraulic race bearing. Bellhousings are
available for many Chevrolet, Ford, and Dodge V-8
applications.
Part# 110432
Rear Mount Starter
Bellhousings
Quarter Master's reverse mount bellhousings are engineered for ultimate
stiffness and are lightweight. They are CNC machined for the best parallelism
and concentricity and can be used with either the Tri-Lite or the Floating
hydraulic race bearing. Bellhousings are available for Many Chevrolet, Ford,
Dodge, and Toyota V-8 applications in both magnesium and aluminum
versions.
Application
Aluminum
Chevrolet
Dodge
Ford
TRD
110155**
110255**
110355**
Magnesium NASCAR® COT Clutchless
Aluminum
110150
110250
110350
110157
110257
110357
110757
110120
110220*
110320
Clutchless
Magnesium
110115
110215*
110315
Magnesium
Part# 110150
Aluminum
Part# 110355
Aluminum
Part# 110120
* Available in 2007 ** Original Bellhousing Style Available - Chevy Part# 110100, Dodge Part# 110200 and Ford Part# 110300
OE diameter block mount
starter bellhousings
Aluminum
Chevrolet 153 tooth
110104
Chevrolet 153 tooth w/mounts
Dodge R5 153 tooth w/mounts
Ford 153 tooth 7/16" bolts w/mounts
Ford 157 tooth 1/2" bolts w/mounts
110302
Ford 153 tooth 7/16" bolts w/mounts (W/Chevy Transmission)
Magnesium
110106
110107
110206
110305M
110308C
Light Weight Steel Bellhousings
Quarter Master's lightweight steel bellhousing is designed for racing classes that require a steel bellhousing. They
feature welded construction and are CNC machined for the best parallelism and concentricity. They can be used with the
Tri-Lite or the Floating hydraulic race bearing. Bellhousings are available for Chevrolet and Ford V-8 applications.
Application
Bellhousing
Steel Bellhousing Accessories
Part#
Chevrolet/Ford
Dodge
110432
110232
Ford Starter Spacer .460"
Ford Starter Spacer .250"
114371
114373
B E L L H O U S I N G S
Quarter Master's Championship winning bellhousings will
accommodate some stock diameter flywheels and block mount
starters. They are CNC machined for the best parallelism and
concentricity and can be used with either the Tri-Lite or the Floating
hydraulic race bearings. Bellhousings are available for many
Chevrolet, Ford, Dodge, and Toyota V-8 applications.
Application
Low Ground Clearance Bellhousings
Quarter Master's low ground clearance bellhousings are engineered for ultimate stiffness and are lightweight. They are designed to be used
with Quarter Master's 105 tooth LGC flywheels. As all Quarter Master bellhousings, these bellhousings are CNC machined for the best
parallelism and concentricity and can be used with either the Tri-Lite or the Floating hydraulic race bearing. Bellhousings are available for
many Chevrolet, Ford, and Dodge V-8 applications in both magnesium and aluminum versions.
*PLEASE NOTE
Call dealer for part availability.
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
25
BUTTON FLYWHEELS FOR USE WITH REAR MOUNT BELLHOUSINGS AND FLEXPLATE ASSEMBLIES
4.5"(114mm)
Pro-Series
Chevy (pre-1986)
504170
Chevy (1985-later) 504171
Neutral balance *
Chevy (1985-later) 504171ZZ
Balanced
Chevy (1985-later)
Neutral balance w/T56
Chevy (1997-later) 504177
Gen III/IV
Dodge R5 (pre-1986
Chevy bolt pattern)
Dodge R5 6 Bolt
Dodge R5 8 Bolt
Ford Small Block 504302
Neutral Balance*
Ford Big Block
5.5"(140mm)
Pro-Series
5.5"(140mm)
V-Drive
5.5"(140mm)
Optimum-V
7.25”(185mm)
Pro-Series
7.25”(185mm)
V-Drive
7.25”(185mm)
Optimum-V
8.25”(215mm)
Extreme-V
505170SC
505171SC
505170SC
505171SC
575170
575171
509110SC
509113SC
509110SC
509113SC
509140
509113SC
512170SC
512171SC
505171SCZZ
505171SCZZ
575171ZZ
509113SCZZ
509113SCZZ
512171SCZZ
512178SC
505177SC
505177SC
575177
505191SC
505191SC
575191
505190SC
505190SC
575190
505302SC
505302SC
575302
509127SC
509127SC
509150
512177SC
509211SC
509211SC
509210SC
509311SC
509211SC
509311SC
512311SC
575303**
* Engines must be internally balanced or use a flexplate with the proper counter weight.
** Designed for use with new design bellhousing 110350
B U T T O N
F L Y W H E E L S
&
R I G
G E A R S
Application
504170 Button 4.5
505171SCZZ Balanced
Button 5.5
509113SCZZ Balanced
Button 7.25
BILLET ONE-PIECE RING GEARS FOR 4.5" (114mm), 5.5" (140mm), and 7.25" (185mm) REAR MOUNT BELLHOUSING KITS
Application
4.5” (114mm) 4.5” (114mm)
5.5” (140mm)
Pro & V-Drive Pro & V-Drive Pro, V-Drv & Opt
5.5” (140mm)
Carbon
7.25” (185mm)
Pro & V-Drive
7.25” (185mm)
Optimum
110018*
110010
110010 inverted**
1100103M
310020
210020 **
Individual Ring Gear
110019
310014
110018
2 disc spacer
1100192D
1100182D
Mid Plate Spacer
1100193M
310013
1100183M
* Starter shims required ** Complete ring gear not a spacer
Kits Including Bolts and spacers
3 disc
3 disc and mid plate
2 disc
2 disc and mid plate
310019
3100193M
2100192D
2100192M
375018
3750183M
275018
2750182M
FLEXPLATES
26
Application
Standard Lightweight
Ultra Lightweight
Chevy V-8 153 Tooth Early Pattern No Balance
Chevy V-8 153 Tooth Late Pattern No Balance
Chevy V-8 168 Tooth Early Pattern No Balance
Chrysler 6 Bolt Crank 130 Tooth (Dished)
Chrysler 6 Bolt Crank 130 Tooth (Flat)
Ford V-8 157 Tooth No Balance
509121
509171
509123
509221
509220
509322
509180
509181
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
512170SC
Button 8.5
Quarter Master manufactures all of its flywheels in-house,
enabling stringent quality control methods and excellent
product availability. All steel flywheels are one piece
designs for the ultimate in lightweight and safety.
Aluminum flywheels feature a press fit and pinned ring
gear with a replaceable heat shield.
FLYWHEELS
Application
4.5"(114mm)
7.25"(185mm)
505172
505173
509112
509107R
509132
509133
509135
509114
8.5"(215mm)
Extreme-V
QMI 10.4”
Pro-Series
OEM
501100
501100
501101
501200
501201
505206
505207
505205
505298
505307
506206
506207
F L Y W H E E L S
Chevrolet V8 (pre-1986) LGC - 105 tooth
Chevrolet V8 (pre-1986) - 153 tooth
Chevrolet V8 (pre-1986) - 153 Tooth Optimum
Chevrolet V8 (pre-1986) - 153 Tooth Optimum Forged
Chevrolet V8 (pre-1986) - 153 Tooth Optimum Ultra Lightweight
Chevrolet V8 ('86-later) LGC - 105 tooth
Chevrolet V8 (pre-1986) - 153
Chrysler/Dodge 6 Bolt - 130 Tooth
Chrysler/Dodge 8 Bolt - 130 Tooth
Datsun L Series 5 Bolt - 94 Tooth Flywheel
Datsun L Series 6 Bolt - 94 Tooth Flywheel
504207
Datsun A Series - 105 Tooth
Dodge Viper V10 ('92-'02) - 152 Tooth
Dodge R5 8 Bolt - 153 Optimum
Ferrari 308
Ford L4 2.0L/2.3L - 135 Tooth
Ford Duratec 2.3L - 116 Tooth
504307
Ford SB V8 LGC - 105 Tooth
Ford SB V8 - 153 Tooth
Ford SB V8 - 153 Tooth Optimum Ultra Lightweight
Ford SB V8 157 Tooth
Ford 4.6L Modular 6 Bolt Aluminum - 164 Tooth
Ford 4.6L Modular 8 Bolt Aluminum - 164 Tooth
Ford 4.6L Modular 6 Bolt Steel - 164 Tooth
Ford 4.6L Modular 8 Bolt Steel - 164 Tooth
Ford 5.0L Aluminum - 157 Tooth
Ford 5.0L Steel - 157 Tooth
Ford 7.25 - 110 Tooth Cosworth
Ford SB V8 GT40 - 117 Tooth
Ford Zetec Formula Ford 7.25
Honda B16A/B18
Honda K20/K24
Mazda Rotary 13B
Mazda Rotary Renesis
MG Midget 1275cc - 104 Tooth
Mini Cooper S 1.6L Aluminum - 138 Tooth
Mitsubishi 4G63T 6 Bolt - 106 Tooth
Mitsubishi 4G63T 7 Bolt - 106 Tooth
Mitsubishi Evo VI, VII, VIII - 114 Tooth
Pontiac L4 2.5L - 141 Tooth
Saab 7.25 2.0L
Toyota 4AGE - 106 Tooth
Triumph Spitfire 5.5
5.5"(140mm)
509218
509230R
506276
506298
509312
509333
509335
501300
512330
512340
512314
512315
512300
512310
107086
506300
107160
505770
509670
512410
512410
506127
512400
505767
505781
506540
506541
509543
506626
107217
506767
FLYWHEEL SERVICE PARTS
Friction Plate Aluminum
Flywheels w/ bolts
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
512302
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
27
Floating Hydraulic
Floating Bearing
Street Stock
Hydraulic Bearing
Race Proven, Time-Tested Design!
OE Style Clutch Design
This bearing has been the standard in short track racing for years. It
features a radius face and return spring to prohibit continuous contact of
the bearing and clutch spring fingers. It is very easy to set up and can be
used with stock as well as any Quarter Master and OE style bellhousing.
Quarter Master’s Street Stock Hydraulic bearing is designed to
be used with OE style clutches that require the use of a flat
bearing face. This bearing works with today’s high pressure
clutch systems.
Compatible with the following transmissions:
T-10
Richmond
Muncie
Tremec TKO 400/600
Saginaw
Jerico
H Y D R A U L I C
R E L E A S E
B E A R I N G S
Part# 710105
(sold separately)
Assembly
Part#
Application
Description
Replacement
Bearing &
Sleeves
Maintenance
Parts
Part#
710100
7.25 Clutches
4.5, 5.5 Clutches
5.5 Clutches
4.5, 5.5 Clutches
7.25 LGC Assemblies
5.5 LGC Assemblies
710103
Seal Kit
710101
710104
Shim Kit
710102
710106
710107
Bleeder Line
Bleeder Screws
710105
730011
710200
710300
710400
Tri-Lite Bearing
Quarter Master's Tri-Lite bearing weighs in at a mere 1.3 lbs. It is CNC
machined from billet aluminum and black anodized for corrosion
resistance. The Tri-Lite bearing can be ordered with or without a return
spring. There is no shimming required. Simply tell us what clutch
system that is being used and order the proper size piston for that
application. Pistons are available in .100" increments to work for a wide
range of applications.
Assembly
Part#
Piston
Length
Piston & Bearing
Only Part #
730165
1.650
731165
730175
1.750
731175
730185
1.850
731185
730195
1.950
731195
730205
2.050
731205
2.150
731215
730215
730225
2.250
731225
730235
2.350
731235
730245
2.450
731245
730255
2.550
731255
Note: Overall length of 730165 = 2.550”
28
*PLEASE NOTE
*PLEASE NOTE
Maintenance
Part
Part#
Seal Kit
Bearing Only
Bleeder Line
Inlet Line
Bleeder Screw
Attachment Screw
730101
105030
710016
730012
720011
730011
See Application Guide Insert for additional part number listings.
When using this bearing with Ford transmissions, the
bearing retainer will need to be machined to 1.370.
Assembly
Part#
Application
Description
Maintenance
Parts
721100
Street Stock
Hydraulic Bearing
Part#
Seal Kit
Shim Kit
Bleeder Line
Inlet Line
Replacement Bearing
NOTE: All hydraulic bearings must use DOT 3 fluid.
721101
720102
710016
730012
106033
Universal Hydraulic
Bearing
Quarter Master's new universal bearing
is designed to be adapted to a multitude
of various applications. It is CNC
machined from billet aluminum and
black anodized for corrosion resistance.
This bearing uses the same proven
internal design of the Tri-Lite bearing
and combines it with a footprint that can
be easily adapted to most transmissions. The same piston and bearing assemblies that are used in the
Tri-Lite can be used in the 740 series release bearing. Available in
sprung or unsprung versions and with pistons in .100" increments
to work for a wide range of applications.
Assembly
Part#
Piston &
Bearing Part #
Piston + Bearing
Length
Overall Height
740165
741165
1.650"
2.210"
740175
741175
1.750"
2.310
Note: All hydraulic bearings must use DOT 3 fluid.
MECHANICAL BEARINGS
FLYWHEEL BOLT KITS
Part#
Application
Length
All Chevy, Ford & Dodge 6 Bolt
505001
0.990
Dirt Kits
505004
1.260
Chevy LS-1 (Metric)
505007
0.990
Ext. Balanced Dirt Kit
505012
1.375
Refer to engine builder specifications for proper torque spec.
4.5 & 5.5
Application
Application
Part#
Chevy
Ford with Jerico, T101
Chevy Extended Length
110011
110012
110013
7.25
PILOT BUSHINGS
Part#
Chevy Mechanical Linkage
Ford Mechanical Linkage
Ford with Floating Bearing
Ford Stampede Applications
Aluminum Ball Stud - No Fork
110005
110007
110008
110353
110017
Part#
1 1-/8x10
1 1/53x26
660080
660090
Application Description
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
B E A R I N G S
710108
T101, T-10
710110
Muncie
710111
T101, T-10 Ford O.D.
710112
Jerico GM O.D.
710114
Jerico Ford O.D. Heavy Duty X Case
710118
Jerico GM O.D. Heavy Duty X Case
710119
Muncie with Input Shaft Seal
Bearing retainers have .800 seat height.
Eliminates shimming tranny bolts.
Keeps bearing square with transmission.
R E L E A S E
Application
136767
236297
BEARING RETAINERS
Part#
SPLINE ALIGNMENT TOOL
*PLEASE NOTE
8.5
Application
136206*
2 Disc
235170
CALL
235206*
235298
235302
235520
235521
209130
109130
209330
209330
209230*
236206*
236520
236521
236767
M E C H A N I C A L
BALL STUDS
1 DIsc
Chevy Button Speedway
Chevy LGC Assemblies
Datsun A&L Series
Ford Pinto 2000/2300
Ford Button w/ 1-1/16 Spline
Mazda Rotary
Mazda Rotary PBS Gear Box
Chevy Button Speedway
Chevy LGC Assemblies
Ford Button w/ 1-1/16 Spline
Ford 2000/2300
Chrysler 1x23
Datsun A&L Series
Mazda Rotary
Mazda Rotary PBS Gear Box
Toyota 4 AG/E
Ford Stampede Series
*Press on O.E. Collar
29
There are gear reduction starters and then there are Quarter Master
Ultra-Duty Starters. We start with the highest quality motors
available and finish them with adapter mounts that accurately
locate the pinion gear for a perfect mesh fit with the flywheel. That’s
the difference between the best and the rest. Ultra-Duty Starters
feature plenty of punch (1.4 Kw) for all performance applications.
With full ball bearing construction and heavy-duty solenoids, they
are not affected by normal underhood operating temperature.
Current draw is approximately 210 amps at rated load. Our 115
Series Permanent Magnet Starters feature an even more compact
design to reduce weight by a full 4 lbs. over the 114 Series
Ultra-Duty Starters without sacrificing cranking power.
FIELD COIL STARTERS
S T A R T E R S
Application
Starter
Part#
Bert/Brinn Replacement Starter
114170
QM Rear Mount for Bert/Brinn
114180
Ford and Chrysler LGC 105 Tooth Flywheel
114190
114220
Dodge R3 w/110205 Bellhousing 153 Tooth
Dodge R5 w/110206 Bellhousing 153 Tooth
114225
114240
Chrysler w/110202 Bellhousing 130 Tooth
114250
Chrysler O.E. Replacement
All Rear Mount Bellhousings with Clutches
114260
QMI Dirt Bellhousing 110 tooth ring gear
114267
QMI Dirt Bellhousing 91 tooth ring gear
114267B
**114270C
Chevy 105 Tooth LGC Block Mount
114280
Chevy 153T & 168T Flywheels and Flexplates
114285
Chevy 153T Cup, BGN, Truck
Ford 157 Tooth for 110302,110304, Bellhousings
114300
Ford 153 Tooth Cup, BGN, Truck
114360
**Adapter Bar for 114270 is required, Part# 11427202.
Starter
Replacement Nose
Drive
Assembly
Pinion
Gear
Pinion
Return Spring
114171
114181
114191
114221
114226
114241
114251
114261
114261
114269
**114271
114281
114286
114301
114361
114174
114036
114002
114031
114283
114002
114002
114262
114268
114292
114002
114283
114283
114283
114283
114003
114182
114003
114222
114282
114003
114003
114263
114175
114292
114003
114282
114282
114282
114282
114044
114045
114044
114044
114044
114044
114044
114045
114045
114045
114044
114044
114044
114044
114044
PERMANENT MAGNET STARTERS
30
Application
Starter
Part#
Starter Replacement
Nose
Chevy 153T Flywheels and Flexplates
Chevy 153T Cup, BGN, Truck
Ford 153 Tooth Cup, BGN, Truck
115280
115285
115360
115281
115286
115361
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Quarter Master driveshafts feature unsurpassed strength and smooth, vibration-free performance. Quality material selection,
rigid tolerances, careful attention to detail during assembly, and a balance spec to less than .125 inch-ounces separate the best
from the rest.
Our revolutionary aluminum driveshafts are built with a two-part, weld-free assembly process that eliminates the distortion and
loss of heat treat strength that welding causes. Hardcoat anodized forged aluminum end yokes are interference fit to special O.D.
ground 3.0" x .120" aerospace aluminum tube then, reinforced with six Monobolt® aircraft fasteners. We install heavy-duty
racing u-joints and a quality slip yoke, then computer balance the assembly. These shafts weigh 40% less than their steel
counterparts. Maximum center-to-center length is 51-3/16".
We can also fill your requirements for steel driveshafts, from 1310 Series Heavy-Duty shafts for circle track cars to 1350 Series
Ultra-Duty assemblies for drag racing applications. All of our steel racing driveshafts are constructed with seamless chrome moly
tubing. Please call or write the factory and we will be glad to mail or fax a worksheet order form to you.
PROCEDURES FOR MEASURING SHAFT LENGTH
The most important dimension of your new aluminum driveshaft is the length. This length is expressed as the distance between
the centers of the front and rear u-joints.
To arrive at this dimension, first raise the car off the ground, being very careful to ensure that the normal vehicle weight is being
supported by the rear suspension. (The suspension is not at full droop or unnecessarily compressed.)
A
Take the slip yoke that the driveshaft will be assembled to and insert it all the way into the tailshaft housing of the transmission.
Now pull it out 3/4" to 1". This will be the free play that all driveshafts need when the suspension moves through its full range
of travel.
Carefully measure the distance between the centers of the front and rear u-joints. Double check the 3/4" to 1" free play in the
slip yoke and measure again as we are not responsible for incorrect measurements.
For circle track cars with a quick change rear end, only A, B, and C need to be known. Complete all lines if your car is equipped
with a Ford 9" rear end.
DRIVESHAFT ORDER SPECIFICATIONS
A. Center to center distance
RACING DRIVESHAFTS
Part#
Description
188000
Aluminum Driveshaft
3.0" x .120" with 1310 Series End
Yokes - specify length
189000
Steel Driveshaft 3.0" x .083"
specify length
B. Type of transmission
C. Type of rear end
D. Rear u-joint cap diameter
E. Measurement across rear u-joint caps
POPULAR TRANSMISSION SLIP YOKES
Part#
Description
188535
Muncie, Saginaw 3 & 4 Speed, Bert, Brinn Winters
(27 spline 1310)
T-10, Jerico, T-101 (31 spline 1310)
Bert, Brinn, Winters with extra length for increased
suspension travel (27 spline 1330- use 187134 u-joint to go to
aluminum driveshaft
188545
188552
*PLEASE NOTE
For transmissions not
listed, please call.
D R I V E S H A F T S
This is the length for your new Quarter Master aluminum driveshaft. Enter this number on line “A” of the form below. Round off
this dimension to the nearest 1/4" increment.
POPULAR U-JOINTS
Part#
Description
187101
187134
187153
187358
187495
187675
187999
U-Bolt Kit, 1310-1330 Series
1310 to 1330 Series 3-5/8" Cross x 1-1/16" Cap
High Performance 1310 Series 3-1/4" Cross x 1-1/16" Cap
1310 to 1350 Series 3-5/8" Cross x 1-3/16" Cap
Ultra-Duty 1310 Series with End Cap Grease fitting
1310 to Ford 9" Rear 3-7/32" Cross x 1-1/8" Cap
1310 to Ford 9" Rear 3-5/8" Cross x 1-1/8" Cap
*PLEASE NOTE
For u-joints not listed, please call.
*PLEASE NOTE
We carry high performance and Ultra Duty u-joints for
many performance applications.
*PLEASE NOTE We can furnish slip yokes
for virtually every
domestic transmission.
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
31
CAMBERED DRIVE FLANGES
Part#
Description
176200
176310
176320
176400
Grand National 5x5 (Hooters Pro Cup)
8 Bolt Wide 5
5 Bolt Wide 5
Howe & PCR 5x5 (ASA Style)
S E A L S
Cambering a solid rear axle-housing increases the tire contact patch with the track surface,
thereby improving handling and lowering lap times, while making driving easier and less
fatiguing. Here's how it works. The snout is machined with the desired amount of camber
angle in it. Once the hub assembly is mounted on the offset snout and axle tube, the driv e
flange is no longer perpendicular to the axle spline. The camber drive flange with the
floating crown gear compensates for that and eliminates axle binding and breakage while
reducing drag in the driveline.
Part# 176310
D R I V E
F L A N G E S
&
A X L E
Part# 176200
Part# 176400
Axle Seals
AXLE TUBE SEAL
32
*PLEASE NOTE
Part#
Description
178188
178220
178250
.188" wall axle tube seal-red
.220" wall axle tube seal-blue
.250" wall axle tube seal-yellow
See Application Guide Insert for additional part number listings.
Part# 176320
6
Over sixty years of gear manufacturing “know-how” was designed into our
Quarter Master Pro Gears.We start by using the highest quality E9310 aircraft
steel. Then we precision hob them to AGMA Class B Tolerances to produce a true
involute tooth form for a high contact ratio. We finish them with a proprietary
heat treat process and hand roll test and inspect them, giving you results on the
track that can't be beat. These quick change gears are specifically designed to
run smoother and last longer than anyone else's and are the finest quick change
gears available in the marketplace today! 64 gear ratios are available in 10 spline
for sprint and late models and 42 gear ratios are available in 6 spline for midgets.
S P L I N E
*PLEASE NOTE
Part#
Lo
3.78
Hi
Lo
4.11
Hi
Lo
Hi
Lo
Hi
Lo
Hi
30/30
23/24
35/37
23/25
17/19
22/25
22/26
20/24
21/26
19/24
21/27
16/21
15/20
17/23
16/22
20/28
19/27
16/23
15/22
20/30
19/29
28/43
23/36
15/24
16/26
17/28
27/45
17/29
22/38
16/28
14/25
15/27
17/31
20/37
25/47
20/38
20/39
24/48
23/47
23/48
15/33
18/41
1.000
1.043
1.057
1.087
1.118
1.136
1.182
1.200
1.238
1.263
1.286
1.313
1.333
1.353
1.375
1.400
1.421
1.438
1.467
1.500
1.526
1.536
1.565
1.600
1.625
1.647
1.667
1.706
1.727
1.750
1.786
1.800
1.824
1.850
1.880
1.900
1.950
2.000
2.043
2.087
2.200
2.278
3.78
3.94
3.99
4.11
4.22
4.29
4.46
4.53
4.68
4.77
4.86
4.96
5.04
5.11
5.19
5.29
5.37
5.43
5.54
5.67
5.76
5.80
5.91
6.04
6.14
6.22
6.30
6.44
6.52
6.61
6.74
6.80
6.89
6.99
7.10
7.18
7.37
7.55
7.72
7.88
8.31
8.60
3.78
3.62
3.57
3.47
3.38
3.32
3.20
3.15
3.05
2.99
2.94
2.88
2.83
2.79
2.75
2.70
2.66
2.63
2.58
2.52
2.47
2.46
2.41
2.36
2.32
2.29
2.27
2.21
2.19
2.16
2.12
2.10
2.07
2.04
2.01
1.99
1.94
1.89
1.85
1.81
1.72
1.66
4.11
4.29
4.35
4.47
4.59
4.67
4.86
4.93
5.09
5.19
5.29
5.40
5.48
5.56
5.65
5.76
5.84
5.91
6.03
6.17
6.27
6.31
6.43
6.58
6.68
6.77
6.85
7.01
7.10
7.19
7.34
7.40
7.50
7.61
7.73
7.81
8.02
8.22
8.40
8.58
9.04
9.36
4.11
3.94
3.89
3.78
3.68
3.62
3.48
3.43
3.32
3.25
3.20
3.13
3.08
3.04
2.99
2.94
2.89
2.86
2.80
2.74
2.69
2.68
2.63
2.57
2.53
2.50
2.47
2.41
2.38
2.35
2.30
2.28
2.25
2.22
2.19
2.16
2.11
2.06
2.01
1.97
1.87
1.80
4.33
4.52
4.58
4.71
4.84
4.92
5.12
5.20
5.36
5.47
5.57
5.69
5.78
5.86
5.96
6.07
6.16
6.23
6.36
6.50
6.61
6.65
6.78
6.93
7.04
7.14
7.22
7.39
7.48
7.58
7.74
7.80
7.90
8.02
8.15
8.23
8.45
8.67
8.85
9.04
9.53
9.87
4.33
4.15
4.10
3.99
3.88
3.81
3.67
3.61
3.50
3.43
3.37
3.30
3.25
3.20
3.15
3.10
3.05
3.01
2.95
2.89
2.84
2.82
2.77
2.71
2.67
2.63
2.60
2.54
2.51
2.48
2.43
2.41
2.38
2.34
2.30
2.28
2.22
2.17
2.12
2.08
1.97
1.90
4.56
4.75
4.82
4.95
5.09
5.18
5.38
5.47
5.64
5.75
5.86
5.98
6.07
6.16
6.26
6.38
6.47
6.55
6.68
6.83
6.95
7.00
7.13
7.29
7.40
7.50
7.59
7.77
7.87
7.97
8.13
8.20
8.31
8.43
8.56
8.65
8.88
9.11
9.31
9.51
10.02
10.38
4.56
4.37
4.31
4.19
4.08
4.01
3.85
3.80
3.68
3.61
3.54
3.47
3.42
3.37
3.31
3.25
3.21
3.17
3.11
3.04
2.98
2.97
2.91
2.85
2.80
2.77
2.73
2.67
2.64
2.60
2.55
2.53
2.50
2.46
2.42
2.40
2.34
2.28
2.23
2.18
2.07
2.00
5.13
5.35
5.42
5.57
5.73
5.82
6.06
6.15
6.35
6.47
6.59
6.73
6.83
6.93
7.05
7.18
7.28
7.37
7.52
7.69
7.82
7.87
8.02
8.20
8.33
8.44
8.54
8.74
8.85
8.97
9.15
9.23
9.35
9.48
9.64
9.74
9.99
10.25
10.47
10.70
11.28
11.67
5.13
4.91
4.85
4.72
4.59
4.51
4.34
4.27
4.14
4.06
3.99
3.90
3.84
3.79
3.73
3.66
3.61
3.57
3.49
3.42
3.36
3.34
3.27
3.20
3.15
3.11
3.08
3.00
2.97
2.93
2.87
2.85
2.81
2.77
2.73
2.70
2.63
2.56
2.51
2.46
2.33
2.25
See Application Guide Insert for additional part number listings.
4.33
4.56
5.13
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
G E A R S
Spur
Ratio
C H A N G E
*PLEASE NOTE
1
2
2A
3
3B
3A
4
4Q
5
5A
6
24Q
25
7Q
23
8
22
9
10
11
12
13
14
15
16
16Q
17
18
18Q
18A
19
20
27Q
28Q
21
29Q
26
30
31
32
33
34Q
# Of
Teeth
Q U I C K
921000
921043
921057
921087
921118
921136
921182
921200
921238
921263
921286
921313
921333
921353
921375
921400
921421
921438
921467
921500
921526
921536
921565
921600
921625
921647
921667
921706
921727
921750
921786
921800
921824
921850
921880
921900
921950
922000
922043
922087
922200
922278
Set#
LO = BIG GEAR ON TOP
M I D G E T
To calculate a final drive ratio for a ring and pinion set that is not on this gear chart, simply multiply the spur ratio times the ring and
pinion ratio. Example: A #5 gear set with a 1.238 spur ratio times a 3.78 ring and pinion equals a 4.68 (rounded) low final drive ratio.
33
Over sixty years of gear manufacturing “know how” was designed into our Quarter Master Standard
Duty Gears. We start by using the highest quality 8620 steel. Then we precision hob them to AGMA
Class 8 Tolerances to produce a true involute tooth form for a high contact ratio. We finish them with
a proprietary heat treat process then hand roll test and inspect each and every gear set, giving you
results on the track that can’t be beat! These quick change gears are specifically designed to run
smoother and last longer than anyone else’s and are the finest quick change gears available in the
marketplace today!
Important Note: These gears are intended for low horsepower use. For high horsepower, use Ultra-Duty gears.
1 0
S P L I N E
U L T R A
G E A R S
*PLEASE NOTE
34
Part#
Set#
# Of Teeth
Spur Ratio
981000
981029
981037
981045
981053
981074
981091
981095
981105
981115
981130
981143
981160
981174
981182
981190
981200
981211
981227
981238
981250
981261
981273
981278
981286
981292
981304
981318
981333
981350
981364
981381
981391
981400
981409
981421
981435
981450
981471
981476
981500
981524
981533
981550
981563
981579
981591
981600
981611
981625
981632
981650
981667
981684
981700
981714
981733
981750
981765
981778
981786
981800
981813
981875
1
1Q
2
5
15
26
6
6Q
25
12
7
7Q
17
8Q
8
19
9Q
9
11
3
13
18
18Q
4Q
20Q
4
20
22
16
10
34
34Q
14
14Q
35
32
32Q
24
36
37
23
21
21Q
27
43
28
28Q
29
39
30
40
41
31
33Q
33
31A
30A
50Q
51Q
52Q
53Q
54Q
55Q
57Q
27/27
35/36
27/28
22/23
19/20
27/29
22/24
21/23
19/21
26/29
23/26
21/24
25/29
23/27
22/26
21/25
25/30
19/23
22/27
21/26
24/30
23/29
22/28
18/23
21/27
24/31
23/30
22/29
18/24
20/27
22/30
21/29
23/32
20/28
22/31
19/27
23/33
20/29
17/25
21/31
22/33
21/32
15/23
20/31
16/25
19/30
22/35
20/32
18/29
16/26
19/31
20/33
18/30
19/32
20/34
14/24
15/26
16/28
17/30
18/32
14/25
15/27
16/29
16/30
1.000
1.029
1.037
1.045
1.053
1.074
1.091
1.095
1.105
1.115
1.130
1.143
1.160
1.174
1.182
1.190
1.200
1.211
1.227
1.238
1.250
1.261
1.273
1.278
1.286
1.292
1.304
1.318
1.333
1.350
1.364
1.381
1.391
1.400
1.409
1.421
1.435
1.450
1.471
1.476
1.500
1.524
1.533
1.550
1.563
1.579
1.591
1.600
1.611
1.625
1.632
1.650
1.667
1.684
1.700
1.714
1.733
1.750
1.765
1.778
1.786
1.800
1.813
1.875
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Hi
4.11
4.23
4.26
4.30
4.33
4.42
4.48
4.50
4.54
4.59
4.65
4.70
4.77
4.83
4.86
4.89
4.93
4.98
5.05
5.09
5.14
5.18
5.23
5.25
5.29
5.31
5.36
5.42
5.48
5.55
5.61
5.68
5.72
5.76
5.79
5.84
5.90
5.96
6.05
6.07
6.17
6.26
6.30
6.37
6.42
6.49
6.54
6.58
6.62
6.68
6.71
6.78
6.85
6.92
6.99
7.05
7.13
7.19
7.25
7.31
7.34
7.40
7.45
7.71
4.11
LO = BIG GEAR ON TOP
Lo
Hi
4.11
4.00
3.96
3.93
3.91
3.83
3.77
3.75
3.72
3.69
3.64
3.60
3.54
3.50
3.48
3.45
3.43
3.40
3.35
3.32
3.29
3.26
3.23
3.22
3.20
3.18
3.15
3.12
3.08
3.05
3.01
2.98
2.95
2.94
2.92
2.89
2.87
2.84
2.80
2.78
2.74
2.70
2.68
2.65
2.63
2.60
2.58
2.57
2.55
2.53
2.52
2.49
2.47
2.44
2.42
2.40
2.37
2.35
2.33
2.31
2.30
2.28
2.27
2.19
4.86
5.00
5.04
5.08
5.11
5.22
5.30
5.32
5.37
5.42
5.49
5.55
5.63
5.70
5.74
5.78
5.83
5.88
5.96
6.01
6.07
6.12
6.18
6.21
6.24
6.27
6.34
6.40
6.48
6.56
6.62
6.71
6.76
6.80
6.84
6.90
6.97
7.04
7.14
7.17
7.29
7.40
7.45
7.53
7.59
7.67
7.73
7.77
7.83
7.90
7.92
8.01
8.10
8.18
8.26
8.33
8.42
8.50
8.57
8.63
8.67
8.74
8.80
9.11
4.86
Lo
4.86
4.72
4.68
4.65
4.61
4.52
4.45
4.44
4.39
4.35
4.30
4.25
4.19
4.14
4.11
4.08
4.05
4.01
3.96
3.92
3.89
3.85
3.82
3.80
3.78
3.76
3.72
3.68
3.64
3.60
3.56
3.52
3.49
3.47
3.45
3.42
3.39
3.35
3.30
3.29
3.24
3.19
3.17
3.13
3.11
3.08
3.05
3.04
3.01
2.99
2.98
2.94
2.91
2.88
2.86
2.83
2.80
2.78
2.75
2.73
2.72
2.70
2.68
2.59
*PLEASE NOTE
1
1Q
2
5
15
26
6
6Q
25
12
7
7Q
17
8Q
8
19
9Q
9
11
3
13
18
18Q
4Q
20Q
4
20
22
16
10
34
34Q
14
14Q
35
32
32Q
24
36
37
23
21
21Q
27
43
28
28Q
29
39
30
40
41
31
33Q
33
31A
30A
50Q
51Q
52Q
53Q
54Q
55Q
57Q
27/27
35/36
27/28
22/23
19/20
27/29
22/24
21/23
19/21
26/29
23/26
21/24
25/29
23/27
22/26
21/25
25/30
19/23
22/27
21/26
24/30
23/29
22/28
18/23
21/27
24/31
23/30
22/29
18/24
20/27
22/30
21/29
23/32
20/28
22/31
19/27
23/33
20/29
17/25
21/31
22/33
21/32
15/23
20/31
16/25
19/30
22/35
20/32
18/29
16/26
19/31
20/33
18/30
19/32
20/34
14/24
15/26
16/28
17/30
18/32
14/25
15/27
16/29
16/30
1.000
1.029
1.037
1.045
1.053
1.074
1.091
1.095
1.105
1.115
1.130
1.143
1.160
1.174
1.182
1.190
1.200
1.211
1.227
1.238
1.250
1.261
1.273
1.278
1.286
1.292
1.304
1.318
1.333
1.350
1.364
1.381
1.391
1.400
1.409
1.421
1.435
1.450
1.471
1.476
1.500
1.524
1.533
1.550
1.563
1.579
1.591
1.600
1.611
1.625
1.632
1.650
1.667
1.684
1.700
1.714
1.733
1.750
1.765
1.778
1.786
1.800
1.813
1.875
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
4.11
4.23
4.26
4.30
4.33
4.42
4.48
4.50
4.54
4.59
4.65
4.70
4.77
4.83
4.86
4.89
4.93
4.98
5.05
5.09
5.14
5.18
5.23
5.25
5.29
5.31
5.36
5.42
5.48
5.55
5.61
5.68
5.72
5.76
5.79
5.84
5.90
5.96
6.05
6.07
6.17
6.26
6.30
6.37
6.42
6.49
6.54
6.58
6.62
6.68
6.71
6.78
6.85
6.92
6.99
7.05
7.13
7.19
7.25
7.31
7.34
7.40
7.45
7.71
4.11
Lo
Hi
4.11
4.00
3.96
3.93
3.91
3.83
3.77
3.75
3.72
3.69
3.64
3.60
3.54
3.50
3.48
3.45
3.43
3.40
3.35
3.32
3.29
3.26
3.23
3.22
3.20
3.18
3.15
3.12
3.08
3.05
3.01
2.98
2.95
2.94
2.92
2.89
2.87
2.84
2.80
2.78
2.74
2.70
2.68
2.65
2.63
2.60
2.58
2.57
2.55
2.53
2.52
2.49
2.47
2.44
2.42
2.40
2.37
2.35
2.33
2.31
2.30
2.28
2.27
2.19
4.86
5.00
5.04
5.08
5.11
5.22
5.30
5.32
5.37
5.42
5.49
5.55
5.63
5.70
5.74
5.78
5.83
5.88
5.96
6.01
6.07
6.12
6.18
6.21
6.24
6.27
6.34
6.40
6.48
6.56
6.62
6.71
6.76
6.80
6.84
6.90
6.97
7.04
7.14
7.17
7.29
7.40
7.45
7.53
7.59
7.67
7.73
7.77
7.83
7.90
7.92
8.01
8.10
8.18
8.26
8.33
8.42
8.50
8.57
8.63
8.67
8.74
8.80
9.11
4.86
Lo
4.86
4.72
4.68
4.65
4.61
4.52
4.45
4.44
4.39
4.35
4.30
4.25
4.19
4.14
4.11
4.08
4.05
4.01
3.96
3.92
3.89
3.85
3.82
3.80
3.78
3.76
3.72
3.68
3.64
3.60
3.56
3.52
3.49
3.47
3.45
3.42
3.39
3.35
3.30
3.29
3.24
3.19
3.17
3.13
3.11
3.08
3.05
3.04
3.01
2.99
2.98
2.94
2.91
2.88
2.86
2.83
2.80
2.78
2.75
2.73
2.72
2.70
2.68
2.59
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
G E A R S
911000
911029
911037
911045
911053
911074
911091
911095
911105
911115
911130
911143
911160
911174
911182
911190
911200
911211
911227
911238
911250
911261
911273
911278
911286
911292
911304
911318
911333
911350
911364
911381
911391
911400
911409
911421
911435
911450
911471
911476
911500
911524
911533
911550
911563
911579
911591
911600
911611
911625
911632
911650
911667
911684
911700
911714
911733
911750
911765
911778
911786
911800
911813
911875
Hi
D U T Y
Spur Ratio
S T A N D A R D
# Of Teeth
S P L I N E
Set#
1 0
Part#
LO = BIG GEAR ON TOP
35
What is Moment of Inertia (MOI)?
Moment of Inertia, or MOI, is a measurement of how much energy it takes to spin an object. The heavier OR larger the object in diameter, the
harder an object is to accelerate or decelerate. If two objects are the same weight and one is half the diameter of the other, then the smaller
diameter object will accelerate and decelerate faster with less overall energy being used. This translates to a faster acceleration coming out of a
turn, and a faster deceleration going into the next turn. Faster acceleration = Speed advantage over the competition.
How is MOI calculated?
MOI is calculated in lb-in 2
MOI = .5 x mass x radius 2
Example: 7.25” Pro Series 3 disc clutch unit weighs 11.0 lbs and
has a MOI of 97.6 lb-in 2
4.5” Pro Series 3 disc clutch unit weighs 5.7 lbs and has
a MOI of 20.4 lb-in 2
M O I
V S .
W E I G H T
Conclusion: The 4.5” Pro-Series 3 disc clutch has a much lower
MOI and will have a definite advantage over the 7.25”.
Check the Rulebooks!
Before you purchase any clutch system, always refer to your rulebook. Most sanctioning bodies indicate the minimum clutch diameter permitted
for the friction/driven discs. Furthermore, some sanctioning bodies specify the number of discs allowed and the type of friction material including
metallic and carbon/carbon. Verify the clutch diameter, number of discs, flywheel or flexplate alloy and the minimum diameter of the
friction/driven discs before purchasing a clutch system.
Maximum Performance or The Right Performance Combined with
Reliability, Durability, and Value?
Now that you understand the importance of MOI, you might be inclined to choose the smallest diameter clutch available, but choosing the
smallest assembly is not always best…
Smaller clutch = less radial friction surface = More Heat and Higher Rate of Wear
If you drive a light clutch around the paddock area, you will be operating the engine at a low rpm, and the engine will stall easily resulting in a
higher rate of wear of the clutch components. If you don’t have a crew to help push or a winch to get the car on the trailer, consider the best clutch
setup for performance, reliability, durability and value.
Need Technical Assistance? Call the experts at Quarter Master
Industries!
When it comes to service, we lap the competition. If you need assistance determining the right clutch for you, call our technical service personnel
for fast and friendly help.
888 CLUTCH 1 (888.258.8241)
36
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
MOI Clutch Applications
Part#
Clutch Application
Description
Early Chevy Button
Late Chevy Button
Late Chevy Bal Button
LS1 Chevy Button
Ford Button
Dodge 6 Bolt Button
Dodge 8 Bolt Button
Pre-86 Chevy Scalloped Button Flywheel
Late Chevy Scalloped Button Flywheel
Pre-86 Chevy Button Flywheel 2 pc Seal
Late Chevy Button Flywheel 1 Pc Seal
Ford Button Flywheel
Pre-86 Chevy Button Flywheel 2 pc Seal
Ford Button Flywheel
Ring Gear for Rear Mount Clutch
New Billet Ring Gear for Rear Mount
Ring Gear for Rear Mount Clutch
Pre-86 Flexplate
86-Later Flexplate
Pre-86 Lightweight
86-Later Flexplate Lightweight
Weight
MOI
1.9
2.1
2.5
2.3
3.5
2.2
1.9
2.12
2.29
3.92
4.04
4.39
5.07
5.31
1.43
1.89
2.14
4.08
4.08
2.9
2.9
9.7
10.2
12.1
9.6
11.7
11.0
9.7
11.4
11.94
33.08
33.33
34.99
56.7
55.94
13.19
28.62
31.21
107.42
107.42
75.8 lb*in^2
75.9 lb*in^2
Torque Capacity and MOI Clutch Ratings
Clutch Type
Weight
MOI
Torque Capacity
Carbon
Carbon
Premium
Premium
Premium
Premium
Premium
Premium
Premium
Premium
Metallic
Metallic
Metallic
Carbon
Carbon
Premium
Premium
Premium
Premium
Premium
Premium
Premium
Premium
Rally
Rally
Race
Race
Race
Race
Race
Race
Premium .125
Premium .125
Premium
Rally
Rally
Race
Race
Race
Race
Race
Race
Race
Heavy Duty
Organic
Rally
Heavy Duty
Rally
3.29
3.48
2.63
3.68
4.25
3.42
4.53
5.77
7.00
3.34
4.5
5.66
6.9
3.77
4.44
4.71
4.71
6.1
6.1
4.95
4.95
6.4
6.4
4.28
6.25
3.94
5.45
6.98
4.06
5.64
7.24
5.11
7.48
9.57
6.71
9.88
6.38
5.24
8.78
10.85
6.06
8.48
10.99
9.62
10.83
10.91
14.1
14.1
12.32
12.45
9.05
12.02
13.43
12.87
16.12
20.11
24.08
12.36
16.36
20.36
24.5
19.4
22.91
22.8
22.8
28.5
28.5
24.2
24.2
30.3
30.3
24.69
33.06
20.39
28.14
35.84
22.21
29.96
38.06
42.19
61.3
79.05
58.25
85.43
54.06
44.4
74.11
93.26
54.30
75.20
97.58
109.22
114.45
113.81
163
163
600-1000
600-1000
320
640
900
270
545
820
1090
250
500
825
1050
700
1000
600
600
900
900
600
600
900
900
300
600
300
600
900
300
600
900
400
800
1200
300
600
280
300
600
900
300
600
1000
500
300
500
1000
800
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
R A T I N G S
Friction Type
3
3
1
2
3
1
2
3
4
1
2
3
4
2
3
2
2
3
3
2
2
3
3
1
2
1
2
3
1
2
3
1
2
3
1
2
1
1
2
3
1
2
3
1
1
1
2
2
M O I
*PLEASE NOTE
Disc
A N D
4.5 Carbon V Drive Ti
4.5 Carbon V Drive
4.5 Optimum-V
4.5 Optimum-V
4.5 Optimum-V
4.5 V-Drive
4.5 V-Drive
4.5 V-Drive
4.5 V-Drive
4.5 Pro Series
4.5 Pro Series
4.5 Pro Series
4.5 Pro Series
5.5 Carbon V
5.5 Carbon V
5.5 Optimum-V
5.5 Optimum-V
5.5 Optimum-V
5.5 Optimum-V
5.5 Optimum-V
5.5 Optimum-V
5.5 Optimum-V
5.5 Optimum-V
5.5 Rally-V
5.5 Rally-V
5.5 V-Drive
5.5 V-Drive
5.5 V-Drive
5.5 Pro Series
5.5 Pro Series
5.5 Pro Series
7.25 Optimum-V
7.25 Optimum-V
7.25 Optimum-V
7.25 Rally-V
7.25 Rally-V
7.25 V-Drive Steel PP
7.25 V-Drive Al PP
7.25 V-Drive Al PP
7.25 V-Drive Al PP
7.25 Pro-Series
7.25 Pro-Series
7.25 Pro-Series
8.5 Extreme-V HR (Solid Hub)
8.5 Extreme-V LR (Sprung Hub)
8.5 Extreme-V HR (Sprung Hub)
8.5 Extreme-V HR (Solid hub) HD
8.5 Extreme-V HR (Solid hub) RY
C A P A C I T Y
5.5 OPT
5.5 OPT
5.5 OPT
5.5 OPT
5.5 OPT
5.5 OPT
5.5 OPT
5.5
5.5
7.25
7.25
7.25
8.5
8.5
7.25
5.5
4.5
153T
153T
153T
153T
T O R Q U E
575170
575171
575171ZZ
575177
575302
575190
575191
505170SC
505171SC
509110SC
509113SC
509311SC
512170SC
512311SC
110010
110018
210011
509121
509171
509180
509181
37
QMI Utilizes the Latest in Engineering Technology
Quarter Master uses the latest engineering technology to design and manufacture the most
advanced driveline racing products. By utilizing 3D solid modeling, Finite Element Analysis (FEA)
design tools, and CAM systems, we are raising performance standards for lightweight, high
performance driveline components while maintaining our reputation for building the most reliable
clutches and drivelines.
Our solid modeling gives us the ability to optimize part weight and moment of inertia (MOI) from the
very start. These models are developed into virtual assemblies to ensure the best possible fit with
other components, as well as evaluating ease of installation. Tooling is now made directly from such
models, ensuring the most accurate parts for your racing application.
Through the use of FEA, we are able to analyze all aspects of our design from heat transfer to
harmonics and stress/strain relationships. The subtle tweaks to the design make the difference
between a fatigue life measured in seasons or in laps. Constant development of our loading models
ensures that the only ‘constant’ is improvement.
E N G I N E E R I N G
&
D E S I G N
3D solid modeling facilitates the
effective transfer of idea to design.
By using the latest parametric CAM technologies, we are able to make the most of our designs in
translating them from files on a computer to hardware on the racetrack. Speed and accuracy are what
we live by, and our systems allow us to keep on the leading edge of changes and improvements
Through the use of FEA, Quarter
Master can truly optimize our designs
without slowing us down.
Rapid prototyping was a buzzword several years ago. We still rapid prototype, we’ve made the
transition to rapid production. With ever shrinking budgets and timelines, Quarter Master works to
prototype the part in its finished form. The end result could be a rapid cast aluminum bellhousing or
a straight-from-billet flywheel.
At Quarter Master, we rigorously test to determine limits and sort out improvements. This starts with
the first FEA Analysis, and we take every opportunity to gather data, from the bench, to the dyno, to
the track, we test at every possible stage.
Quartermaster turns visions to reality
utilizing Esprit CAM software
Quarter Master is there from the Start line to the Finish line,
bringing the latest technology to your application through our products.
38
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Quality Control
Quarter Master maintains the highest standard of quality control to ensure
that every product meets or exceeds industry standards. TQM (Total Quality
Management) is one of many systems utilized in the development, design
Q U A L I T Y
and manufacturing process of every Quarter Master product. Our raw material and component suppliers must also adhere to our stringent quality programs to further guarantee product integrity. At Quarter Master, quality is not
a job, it's an obsession. That's why we inspect every part before it leaves our
facility. Don't settle for second best.Specify Quarter Master clutches and dri-
A S S U R A N C E
veline components.
Quarter Master
Shifting Clutch Technology Forward
Warranty
&
W A R R A N T Y
WARRANTY,DISCLAIMER,LIMITATION OF LIABILITY AND REMEDY: Seller warrants it’s products sold hereunder to be free from defects in material
and workmanship provided that the products shall not have been altered or repaired after shipment to Buyer by anyone except Seller’s authorized
employees.Seller must be given an opportunity to make an investigation and inspection of any asserted defects which must be reported
promptly in writing within ten days of discovery. Any claim will evaluated by Seller on a case by case basis.EXCEPT FOR THE FOREGOING,IT IS
EXPRESSLY AGREED THAT NO WARRANTY OF MERCHANTABILITY,NOR ANY OTHER WARRANTY,EXPRESS OR IMPLIED OR STATUTORY,IS MADE BY
SELLER HEREUNDER.SELLER’S ENTIRE AND EXCLUSIVE LIABILITY,WHETHER FOUNDED ON WARRANTY,CONTRACT,NEGLIGENCE OR
OTHERWISE,AND BUYER'S EXCLUSIVE RIGHT AND SOLE REMEDY IS LIMITED TO REPAIR OR REPLACEMENT OF DEFECTIVE PRODUCTS,F.O.B.
SELLER'S FACTORY, OR AT SELLER'S OPTION THE RETURN OF THE PURCHASE PRICE.SELLER SHALL IN NO EVENT BE LIABLE FOR ANY DAMAGES OF
ANY KIND WHATSOEVER,WHETHER DIRECT,INDIRECT,INCIDENTAL,SPECIAL OR CONSEQUENTIAL,INCLUDING,WITHOUT LIMITATION,ANY DAMAGE
OR INJURY TO PERSON OR PROPERTY, LOSS OF SALES OR PROFIT OR INCREASED COST OR EXPENSE.
PATENT WARRANTY: Seller shall indemnify Buyer to the extent stated bellow against any money judgement (including any settlement to which
Seller consents) for infringement of a United States patent by reason of the use or sale of the products furnished hereunder in the form supplied
(but not by reason of their use or sale and combination with one or more products not furnished hereunder), provided that Buyer notifies seller
promptly in writing of all claims of infringement, and permits Seller, at this option, to defend or be represented by counsel in defense thereof and
provide Seller with all cooperation and information necessary or helpful in defending or settling any such claim or suit. Sellers liability under the
preceding sentence shall in no event exceed the purchase price of such products, nor shall Seller in any event be liable for any indirect, special or
consequential damages, including, without limitation, loss of business or profit or injury to reputation. Notwithstanding the above, Seller shall not
be liable for the infringement or claimed infringement of any patent arising out of the manufacture, sale or use of any products made in accordance
with any or all designs, drawings, formulae or other specifications furnished by Buyer, and BUYER AGREES TO DEFEND AND HOLD SELLER
HARMLESS AGAINST ANY AND ALL CLAIMS, DEMANDS OR JUDGEMENTS THEREFORE.
CUSTOMER SATISFACTION POLICY
It is our sincere policy to supply the customer with the proper product at all times. It will be necessary for the Buyer to use the Seller’s catalog to
assure the proper product the Buyer’s intended application. The Buyer has the final decision as to product choice; therefore, he or she assumes
responsibility to judge proper part usage and all risks, liabilities and costs in connection therewith. If there is any doubt, please contact the
factory for assistance.
Quarter Masters Industries sells through established Warehouse Distributors. Request for a Warehouse Distributorship will be subjected to a
formal process, including, but not limited to, credit and banking history verification, trade and industry references, potential geographic conflict
with existing warehouse distributors, past trade practices, verification of dealer network, and potential sales volume. Upon approval, terms will
be COD-Company Check Acceptable until adequate sales and payment history is established to permit a formal review for open account
status.
*PLEASE NOTE
See Application Guide Insert for additional part number listings.
Toll Free: 1.888.CLUTCH-1 (258.8241)
www.racingclutches.com
39
Quarter Master Industries
510 Telser Road, Lake Zurich, IL 60047
Toll Free: 888-clutch-1 (258-8241)
Phone: 847-540-8999
Fax: 847-540-0526
www.RacingClutches.com
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