Mufflers - Grand Rock Truck Exhaust Systems

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
QPM-851-44 8" X 51" OAL / 44" BODY / 4" I.D. IN AND OUT
QPM-8H
HD MUFFLER HANGER 8" DIAMETER
¢
64
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QP MUFFLERS
NEW
PATENT PENDING
Introducing the NEW
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.
HF-1051
DESCRIPTION
10" X 51" OAL / 44" BODY / 5" I.D. IN AND OUT
1-800-321-3674
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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).
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
66
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CUSTOM MUFFLERS
A
B
C
Body Diameter
Available
D
E
G
G Measurement
12
Type 1
Type 4A
12
1
Type 2
Type 3
NOTE: All
inlet end
12
Type 4
1
Type 6
Type 7
Final
Please fax us your specs.
1-800-321-3674
www.grandrock.com
67

MUFFLERS CHART
PART # DESCRIPTION TYPE INLET ID OUTLET ID
M-034 H.D. MUFFLER; STYLE
"4", BLUEBIRD,GMC
M-070 H.D. MUFFLER; STYLE
"2", FREIGHTLINER
M-079 H.D. MUFFLER; STYLE
"1", BLUEBIRD
M-087 H.D. MUFFLER; STYLE
"1", FREIGHTLINER
M-106 H.D. MUFFLER; STYLE
"2", INTERNATIONAL
M-110 H.D. MUFFLER; STYLE
"1", THOMAS
M-115 H.D. MUFFLER; STYLE
"3", BLUEBIRD,THOMAS
M-124 H.D. MUFFLER; STYLE
"3", BLUEBIRD
M-125 H.D. MUFFLER, 4" ;
STYLE "2", THOMAS
M-127 H.D. MUFFLER, 4"; STYLE
"1",THOMAS
M-131 H.D. MUFFLER, 4"; STYLE
"1",BLUEBIRD
M-147 H.D. MUFFLER, 5" ;
STYLE "2", THOMAS
M-152 H.D. MUFFLER; STYLE
"3", BLUEBIRD
M-153 H.D. MUFFLER; STYLE
"2", INTERNATIONAL,
GMC, THOMAS
M-185 H.D. MUFFLER; STYLE
"2A"INTERNATIONAL
M-465 H.D. MUFFLER; STYLE
"1", BLUEBIRD
M-502 H.D. MUFFLER; STYLE
"2", FORD, FREIGHTLINER
M-514 H.D. MUFFLER; STYLE
"1", BLUEBIRD
M-529 H.D. MUFFLER; STYLE
"2", FORD
M-536 H.D. MUFFLER; STYLE "2"
INTERNATIONAL
M-622 H.D. MUFFLER; STYLE
"8", BLUEBIRD, GMC
M-624 H.D. MUFFLER; STYLE
"2", CHEVROLET/GMC
M-625 H.D. MUFFLER; STYLE
"4", BLUEBIRD
M-626 H.D. MUFFLER; STYLE
"4", THOMAS
M-672 H.D. MUFFLER; STYLE
"6",THOMAS
M-722 H.D. MUFFLER; STYLE
"2A", BLUEBIRD,GMC,
SPHERICAL FLARE
M-755 H.D. MUF-
FLER; STYLE "5",
FORD,INTERNATIONAL
M-878 H.D. MUFFLER; STYLE
"1", FREIGHTLINER
M-879 H.D. MUFFLER; STYLE
"2", FREIGHTLINER
BODY
DIAMETER
BODY
LENGTH
OVERALL
LENGTH
INLET
OFFSET
OUTLET
OFFSET
INLET
POSITION
OUTLET
POSITION
4 4" 4" 11" 36" 40" 4.5" 2.5" 3 12
2 3" 4" 11" 36.25" 42" 3" 4" 6 12
1 4" 4" 10" 36" 43"
1 4" 4" 11" 36" 43"
2 3.5" 3.5"
8.25" X
11.5"
1 3.5" 4" 8.5" 29.5" 36"
26" 32" 3" 3" 12 6
3 4" 4" 10" X 15" 26" 2 29.2" 4" 4" 12 6
3 4" 5" 12" X 15" 30" 3 34" 4" 4" 12 6
2 4" 4" 10" X 15" 34" 40.5" 4.25" 4.25" 6 12
1 4" 4" 8.5" 34.5" 40"
1 4" 4" 9" 44.5" 51"
2 5" 5" 10" X 15" 27" 33" 3.3" 3.3" 12 6
3 3" 4" 10" X 15" 30" 3 34" 4" 4" 12 6
2 4" 4"
2A
2.75"-
2.75"
4"
8.25" X
11.5"
8.25" X
11.5"
1 5" 5" 10.1" 44.5" 51"
27" 33" 2.5" 2.5" 12 6
27" 32.75" 4"-4" 2.5" 12-6 6
2 4" 4" 11" 36" 41.2" 2.5" 2.5" 12 6
1 4" 5" 9" 44.5" 51"
2 4" 4" 11" 36" 42.2" 2.5" 2.5" 12 6
2 3.5" 4"
8.25" X
11.5"
32" 36.5" 2.5" 2.5" 12 6
8 2.5" FLANGE 8.5" 29.5" 37.5" 2.5" 2.5" 12 3-3
2 2.75" 3" 8.5" 30.25" 36.25" 3" 2.75" 12 6
4 4" 4" 11" 42" 45" 4" 0 12 0
4 4" 4" 11" 33.5" 36.5" 4" 0 12 0
6 5" 5" 10" X 15" 36" 38.8" 4" 28.5" 12 6
2A
2.5"-
2.5"
FLARE
5 3.5" 4" OD
3 "OD 8.7" 30" 39" 1.75" 2" 1:30-10:30 6
8.25" X
11.5"
1 3" 4" 11" 36" 41.75"
32" 38.4" 2.5" 2.5" 12
6(90*
ELBOW)
2 3.5" 4" 11" 36" 42" 3" 0 0 12
68
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