4 Inch Diameter

4 Inch Air Intake Hoses

4 Inch Air Intake Pipes

4 Inch Brackets

4 Inch Clamps

4 Inch Couplers & Connectors

4 Inch Diverter Boxes

4 Inch Other Products

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20458817 Mack Vision & CH 10" Round x 44.5" 5" Inlet-Outlet M-130

Grand Rock 20458817 Mack Vision & CH 10" Round x 44 with 5" Inlet-Outlet M-130

MSRP: $378.00

$298.00

Grand Rock Mack Granite & R Model Muffler 10" Round x 44" 4" Inlet - 5" Outlet

MSRP: $488.00

$246.00

Grand Rock 9" Round Hi-Flow Truck Muffler that is 44.5" Long with 4" IN/OUT D13-4590

MSRP: $382.00

$196.00

Grand Rock M-132 Type 1 Muffler 9" Round x 44.5 " Body 5" In-Out 51" Overall

MSRP: $366.00

$256.00

M-136 or 10050 Type 1 Muffler 10" x 36" Body 5" ID Inlets - Great For Dump Trucks

Grand Rock M-136 or 10050 Type 1 Muffler 10" x 36" Body 5" ID Inlets Dump Trucks

MSRP: $610.00

$380.00

Grand Rock M-139 Type 2 Muffler 8.5" Round x 31" 3" IN-OUT

MSRP: $336.00

$246.00

M-1436 Type 1 Diesel Muffler 14" Round 36" Long 5" IN-OUT

Grand Rock 14" Round Diesel Muffler 36" Long 5" IN-OUT M-1436

MSRP: $1,927.00

$1,227.00

Grand Rock M-144 Type 1 Resonator 9" x 10" with 4" Inlet-Outlet

MSRP: $264.00

$182.00

M-145 Type 1 Resonator 9" Round x 10" long with 5" IN-OUT

Grand Rock 9" Round Resonator x 10" long with 5" IN-OUT M-145

MSRP: $305.00

$205.00

Grand Rock M-147 Type 2 Oval Thomas Muffler 10 x 15 x 26" 5" IN-OUT

MSRP: $511.00

$411.00

Grand Rock Mack DM Muffler 10 x 15 Oval 4" Inlet 3.8" OD Outlet 16" long

MSRP: $362.50

$290.00

Grand Rock M-153 Type 2 Oval Muffler 8.25" x 11.5" x 27" 4" IN-OUT MO90534

MSRP: $388.00

$271.00

633 products total