QP MUFFLERS
7.8% Fuel Mileage Increase (avg.)
Replaces Stock Mufflers
Quiet as a Stock Muffler*
Meets Federal and California Sound Levels
Heavy Gauge, 100% welded construction
No Turbo Lag, Faster Acceleration
Works On All Engines
Easily Installed, Bolts in place
Patented 2004
30 Day Money Back Guarantee
Use less fuel and improve
your company’s bottom line.
!
"
#
#
!
$
%
&
'
(
)
*
+
PART NO.
DESCRIPTION
QPM-1051
10" X 51" OAL / 44" BODY / 5" I.D. IN AND OUT
QPM-851
8" X 51" OAL / 44" BODY / 5" I.D. IN AND OUT
QPM-851-34
8" X 51" OAL / 44" BODY / 3" I.D. IN AND 4" I.D. OUT
QPM-851-354 8" X 51" OAL / 44" BODY / 3.5" I.D. IN AND 4" I.D. OUT
64
QPM-851-44
8" X 51" OAL / 44" BODY / 4" I.D. IN AND OUT
QPM-8H
HD MUFFLER HANGER 8" DIAMETER
1-800-321-3674
www.grandrock.com
QP MUFFLERS
NE W
Introducing the NEW
PATENT PENDING
HF-1051 (High Flow)
Stock Replacement Muffler
3% minimum gain in MPG Guaranteed.
30 Day Money Back Guarantee
Easily Installed, Bolts in Place
Heavy Gauge, 100% Welded Construction
No Turbo Lag, Faster Acceleration
Replaces Stock 10" Diameter Mufflers, Affordable
HIGHEST CFM Flow of ANY Mufflers
Quiet as a Stock 10" Diameter Muffler*
Meets Federal and California Sound Levels
Works on All Engines, ISX, 3406E, 14L Series 60, Etc.
*Driving and Acceleration only, NOT engine braking.
Use less fuel and improve your
company's bottom line.
PART NO.
DESCRIPTION
HF-1051
10" X 51" OAL / 44" BODY / 5" I.D. IN AND OUT
1-800-321-3674
www.grandrock.com
65
CATALYTIC CONVERTER MUFFLERS
Certified to Meet EPA Requirements
Grand Rock converter mufflers are engineered to enable midrange engines to meet emission requirements of the EPA's
Diesel Emissions Standards. The catalytic core within the
muffler reduces gaseous hydrocarbons, carbon monoxide,
and particulates, while at the same time reducing exhaust
noise to 67-72 dBA at 50 feet per the EPA drive-by noise test
(levels will vary depending on system configuration).
66
Same package size as
equivalent mufflers
Only 10 to 15 pounds heavier
than equivalent mufflers
409 Stainless steel
Internal design for even
exhaust flow distribution
1-800-321-3674
www.grandrock.com
CUSTOM MUFFLERS
7ECANEITHERMODIFYEXISTINGMUFmERSORBUILDTHEMFROMSCRATCH
7ENEEDTOKNOWTHEFOLLOWING
1UANTITY????????????????????????????
4YPESEESAMPLES ?????????????????
%NGINE4YPE3IZE??????????????????
Body Diameter
Available
A)NLET$IAMETER)$OR/$?????????
B/UTLET$IAMETER)$OR/$????????
C"ODY$IAMETER????????????????????
D"ODY,ENGTH??????????????????????
E/VERALL,ENGTH????????????????????
12
Ê,OCATIONOF)NLET#LOCK0OSITION????
G ,OCATIONOF/UTLET#LOCK0OSITION??
G Measurement?????????????????????
X
X
Type 1
Type 4A
12
1
Type 2
Type 3
NOTE: All
CLOCKPOSITIONS
VIEWEDFROM
inlet end
OFMUFmER
12
Type 4
1
Type 6
Type 7
!LL#USTOM-UFmER3ALESAREFinalWITHNORETURNS
4HEMANUFACTURINGANDSHIPPINGPROCESSISGENERALLYDAYS
!PICTUREISWORTHATHOUSANDWORDSPlease fax us your specs.
1-800-321-3674
www.grandrock.com
67
MUFFLERS CHART
BODY
DIAMETER
BODY
LENGTH
OVERALL
LENGTH
INLET
OFFSET
OUTLET
OFFSET
INLET
POSITION
OUTLET
POSITION
4"
11"
36"
40"
4.5"
2.5"
3
12
3"
4"
11"
36.25"
42"
3"
4"
6
12
1
4"
4"
10"
36"
43"
H.D. MUFFLER; STYLE
"1", FREIGHTLINER
1
4"
4"
11"
36"
43"
M-106
H.D. MUFFLER; STYLE
"2", INTERNATIONAL
2
3.5"
3.5"
8.25" X
11.5"
26"
32"
3"
3"
12
6
M-110
H.D. MUFFLER; STYLE
"1", THOMAS
1
3.5"
4"
8.5"
29.5"
36"
M-115
H.D. MUFFLER; STYLE
"3", BLUEBIRD,THOMAS
3
4"
4"
10" X 15"
26" 2
29.2"
4"
4"
12
6
M-124
H.D. MUFFLER; STYLE
"3", BLUEBIRD
3
4"
5"
12" X 15"
30" 3
34"
4"
4"
12
6
M-125
H.D. MUFFLER, 4" ;
STYLE "2", THOMAS
2
4"
4"
10" X 15"
34"
40.5"
4.25"
4.25"
6
12
M-127
H.D. MUFFLER, 4"; STYLE
"1",THOMAS
1
4"
4"
8.5"
34.5"
40"
M-131
H.D. MUFFLER, 4"; STYLE
"1",BLUEBIRD
1
4"
4"
9"
44.5"
51"
M-147
H.D. MUFFLER, 5" ;
STYLE "2", THOMAS
2
5"
5"
10" X 15"
27"
33"
3.3"
3.3"
12
6
M-152
H.D. MUFFLER; STYLE
"3", BLUEBIRD
3
3"
4"
10" X 15"
30" 3
34"
4"
4"
12
6
M-153
H.D. MUFFLER; STYLE
"2", INTERNATIONAL,
GMC, THOMAS
2
4"
4"
8.25" X
11.5"
27"
33"
2.5"
2.5"
12
6
M-185
H.D. MUFFLER; STYLE
"2A"INTERNATIONAL
2A
2.75"2.75"
4"
8.25" X
11.5"
27"
32.75"
4"-4"
2.5"
12-6
6
M-465
H.D. MUFFLER; STYLE
"1", BLUEBIRD
1
5"
5"
10.1"
44.5"
51"
M-502
H.D. MUFFLER; STYLE
"2", FORD, FREIGHTLINER
2
4"
4"
11"
36"
41.2"
2.5"
2.5"
12
6
M-514
H.D. MUFFLER; STYLE
"1", BLUEBIRD
1
4"
5"
9"
44.5"
51"
M-529
H.D. MUFFLER; STYLE
"2", FORD
2
4"
4"
11"
36"
42.2"
2.5"
2.5"
12
6
M-536
H.D. MUFFLER; STYLE "2"
INTERNATIONAL
2
3.5"
4"
8.25" X
11.5"
32"
36.5"
2.5"
2.5"
12
6
M-622
H.D. MUFFLER; STYLE
"8", BLUEBIRD, GMC
8
2.5"
FLANGE
8.5"
29.5"
37.5"
2.5"
2.5"
12
3-3
M-624
H.D. MUFFLER; STYLE
"2", CHEVROLET/GMC
2
2.75"
3"
8.5"
30.25"
36.25"
3"
2.75"
12
6
M-625
H.D. MUFFLER; STYLE
"4", BLUEBIRD
4
4"
4"
11"
42"
45"
4"
0
12
0
M-626
H.D. MUFFLER; STYLE
"4", THOMAS
4
4"
4"
11"
33.5"
36.5"
4"
0
12
0
M-672
H.D. MUFFLER; STYLE
"6",THOMAS
6
5"
5"
10" X 15"
36"
38.8"
4"
28.5"
12
6
M-722
H.D. MUFFLER; STYLE
"2A", BLUEBIRD,GMC,
SPHERICAL FLARE
2A
2.5"2.5"
FLARE
3 "OD
8.7"
30"
39"
1.75"
2"
1:30-10:30
6
H.D. MUFFLER; STYLE "5",
FORD,INTERNATIONAL
5
3.5"
4" OD
8.25" X
11.5"
32"
38.4"
2.5"
2.5"
12
6(90*
ELBOW)
M-878
H.D. MUFFLER; STYLE
"1", FREIGHTLINER
1
3"
4"
11"
36"
41.75"
M-879
H.D. MUFFLER; STYLE
"2", FREIGHTLINER
2
3.5"
4"
11"
36"
42"
3"
0
0
12
PART #
DESCRIPTION
M-034
H.D. MUFFLER; STYLE
"4", BLUEBIRD,GMC
4
4"
M-070
H.D. MUFFLER; STYLE
"2", FREIGHTLINER
2
M-079
H.D. MUFFLER; STYLE
"1", BLUEBIRD
M-087
M-755
68
TYPE
INLET ID OUTLET ID
1-800-321-3674
www.grandrock.com