Grand Rock

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Grand Rock M-150 Type 1 Resonator 9" x 14" with 3.5" ID Inlet-Outlet

MSRP: $420.24

$317.24

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

MSRP: $399.65

$279.14

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M-1774 Type 1 Muffler for Freightliner 8" Body 55" Long

Grand Rock Muffler for Freightliner 8" Round x 55" Long Body M-1774

MSRP: $1,468.77

$953.78

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Grand Rock M-180 Type 2 Muffler 10" x 15" Oval 32" 6" IN-OUT M122300

MSRP: $785.89

$391.40

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Grand Rock M-187 Type 1 Muffler 3" Inlet-Outlet 6.1" x 21" Body - 30" Overall

MSRP: $376.98

$232.78

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Grand Rock M-188 Type 1 Muffler 7.1" x 30" Body 3.5" Inlet/Outlet 38" Overall

MSRP: $316.21

$254.41

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Grand Rock M-196 Type 1 Muffler For Cummins Electronic 10" x 44.5" 5" IN-OUT

MSRP: $524.27

$349.17

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Grand Rock M-444 Type 1 Muffler 10" Round 4" Inlet-Outlet 44.5" Body - 51" Overall

MSRP: $420.23

$210.12

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M-502 Type 2 Muffler for Ford 11" Round x 36" long 4" In-Out

Grand Rock Type 2 Muffler for Ford 11" Round x 36" long 4" In-Out M-502

MSRP: $591.22

$360.50

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Grand Rock 5" Ford Oval Muffler 10" x 15" x 36" Body M-503 Type 6

MSRP: $838.43

$529.42

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Grand Rock M-512 Type 2 Muffler for International 8.25" x 11.5" 3.5" IN - 4" OUT

MSRP: $494.40

$309.00

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Mack Granite & R Series Muffler Type 1 9" x 44.5" 4" IN-5" OUT

Grand Rock Mack Granite & R Series Muffler 9" x 44 with 4" IN/5" OUT Type 1 M-514

MSRP: $502.63

$295.61

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Grand Rock M-518 Type 2 Muffler 6" Round x 26" 2.5" IN-OUT

MSRP: $281.19

$188.49

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Grand Rock M-526 10" Round Muffler for GMC Brigadier and Astro 5" IN-OUT

MSRP: $786.93

$439.82

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Grand Rock M-529 Type 2 Muffler for Ford School Bus 11" x 36" Round 4" IN-OUT

MSRP: $630.36

$465.56

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Ford or Kenworth Truck Muffler 11.1" x 36" M-530 Type 6

Grand Rock Ford or Kenworth Truck Exhaust Muffler 11" x 36" 4" IN/OUT Type 6

MSRP: $690.10

$423.33

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Grand Rock M-533 Type 1 Muffler 9" x 25" Peterbilt 379 Standard Hood

MSRP: $632.42

$395.52

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Grand Rock M-533-0 Type 1 Muffler 9" x 25" Peterbilt 379 LOW RESTRICTION

MSRP: $662.30

$456.30

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M-536 Type 2 Muffler International 8.25 x 11.5 Oval 32" Long 3.5" IN 4" OUT

Grand Rock Type 2 Muffler International 8.25 x 11.5 Oval 32" Long 3.5" IN 4" OUT

MSRP: $481.02

$326.52

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Grand Rock 1648000C2 International DT466 Horizontal Outlet Oval Muffler M-537

MSRP: $508.44

$375.57

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1647999C2 International Oval Muffler 8.25 x 11.5 x 32" M-545 Type 6

Grand Rock 1647999C2 International Oval Muffler 8.25 x 11.5 x 32" M-545

MSRP: $498.05

$378.57

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Grand Rock International Oval Muffler 8.25" x 11.5" x 32" Long M-548 Type 6

MSRP: $452.15

$364.60

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M-556 Type 1 Resonator 9" x 10" x 16" 3" IN-OUT

Grand Rock M-556 Type 1 Resonator 9" x 11.5" x 16" 3" IN-OUT

MSRP: $407.89

$212.19

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Grand Rock M-557 Type 1 Muffler 9" x 34" Peterbilt 379 Extended Hood

MSRP: $525.30

$401.70

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Grand Rock M-557-0 Type 1 Muffler 9" x 34" Peterbilt 379 Extended Hood Low Restriction

MSRP: $630.36

$444.96

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Grand Rock M-595 Type 1 Universal Exhaust Muffler 9" x 20" 5" Inlets-Outlets

MSRP: $450.11

$244.11

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M-622 Type 2A Muffler Dual In-Single Out Flanged for Bluebird Chevrolet-GMC

Grand Rock Muffler Dual In-Single Out Flanged for Bluebird Chevrolet-GMC

MSRP: $944.52

$625.22

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Grand Rock M-624 Type 2 Muffler for GMC 8.5" x 30.25" 2.75 IN - 3" OUT

MSRP: $627.26

$369.76

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Grand Rock M-625 Type 4 Bluebird Bus Round Muffler 11" x 42" 4"IN-OUT

MSRP: $835.34

$464.53

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Grand Rock M-626 Type 4 Muffler for Thomas School Bus 11 x 33.5 4" IN-OUT

MSRP: $836.36

$455.26

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Grand Rock M-630 Type 1 Muffler 6" Round x 24" Body 4" In-Out 30" Overall

MSRP: $450.11

$295.61

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Western Star Muffler 10" x 44.5" Body 6" ID IN-OUT Lo-Max (M-651)

Grand Rock Western Star Muffler 10" x 44.5" Body 6" ID IN-OUT Lo-Max

MSRP: $988.79

$507.78

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Grand Rock Ford Diesel Truck Muffler 11" x 36" 5" IN-OUT M-672 Type 6

MSRP: $760.13

$421.26

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Grand Rock M-722 Type 2A Muffler Bluebird GMC 8.7" x 30" 2.5" IN-3" OD OUT

MSRP: $734.40

$497.50

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Grand Rock M-755 Type 3 Oval Muffler 8.25" x 11.5" x 32" 3.5" IN-4" OD OUT

MSRP: $697.29

$371.82

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M-757 12.3" x 15.2" Oval Muffler 27" Body 5" IN-OUT

Grand Rock 12.3" x 15.2" Oval Muffler 27" Body 5" IN-OUT M-757

MSRP: $1,680.96

$1,165.96

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Grand Rock M-824 Type 1 Powerflow Muffler 8" Round x 15" Body 4" IN-OUT 21.5 Overall

MSRP: $348.14

$214.24

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Grand Rock M-878 Type 1 Muffler for Freightliner 11" Round x 36" 3" IN 4" OUT

MSRP: $730.27

$369.77

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Grand Rock M-922 Type 3A Kenworth Aerocab High Performance Muffler

MSRP: $735.43

$529.43

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Grand Rock M-922-6 Type 3A Muffler 9" x 22" 6" INLET 6" OUTLET

MSRP: $735.42

$529.42

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Grand Rock 5" Kenworth Stack Mount Bracket Polished Stainless Steel MB-5KWS

MSRP: $213.21

$161.71

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Grand Rock 5" Peterbilt Stack Mounting Bracket Polished SS MB-5PBS

MSRP: $153.46

$129.77

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Grand Rock 6" Kenworth Stack Mount Bracket Polished Stainless Steel MB-6KWS

MSRP: $213.20

$159.64

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Grand Rock 6" Peterbilt Stack Mounting Bracket Polished SS MB-6PBS

MSRP: $195.71

$154.50

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6" Western Star Constellation Stack Mount Bracket Clamp MB-6WSS

Grand Rock 6" Western Star Constellation Stack Mount Bracket MB-6WSS

MSRP: $202.90

$155.52

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Grand Rock 7" Kenworth Stack Mount Bracket Polished Stainless Steel MB-7KWS

MSRP: $218.37

$164.81

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Grand Rock 7" Peterbilt Stack Mounting Bracket Polished SS MB-7PBS

MSRP: $187.46

$163.77

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Grand Rock 7" Western Star Constellation Stack Mount Bracket MB-7WSS

MSRP: $214.24

$177.16

2082 products total

We proudly carry products from Grand Rock, because we know they've been providing high-quality exhaust system components for nearly 50 years. The manufacturer uses over a dozen different machines and the latest software to ensure that their customers get high-quality exhaust solutions.Grand Rock makes over 95% of its products in-house. So when it's time to upgrade, maintain, or replace your exhaust system, you can do it confident that you're getting American quality and supporting American workers.Grand Rock Exhaust ProductsWhether you own one rig or manage a fleet, you know that exhaust problems can result in significant downtime and lost hauling opportunities. High-quality Grand Rock components keep your rig performing optimally and within DOT regulations.MufflersA well-built muffler keeps your rig compliant with federal pollution standards and federal, state, and local noise emission regulations. It improves engine performance by minimizing backpressure and reducing the risk of overheating due to improper airflow. A quality muffler can even save you on fuel and preserve horsepower.We offer Grand Rock mufflers in various sizes and configurations to match your rig. You can also choose a custom muffler and outlet patch.Exhaust TubesHigh-grade pipes provide airflow, emissions compliance, and optimal engine performance, and prevent dangerous gases from entering the cab. Select Grand Rock Y-pipes, S-pipes, curved top, or other tubes for Kenworth, International, Freightliner, and other semi manufacturers, or find a specific part to fit your custom industrial or fabrication needs.ClampsYour exhaust tubes need quality-made clamps to keep them firmly in place. Unsecured tubes, especially large-diameter ones, can lead to costly damage. We offer Grand Rock clamps for horizontal and vertical applications in sizes ranging from 2.5 to 8" and in a variety of finished materials.ElbowsHorizontal and vertical exhaust systems demand high-quality elbows. If you're experiencing a loss in fuel economy or engine power, or hear hissing or rumbling noises, a damaged elbow may be the culprit. In custom tube applications, elbows give you the flexibility to go around beams, walls, or other obstacles. We offer hundreds of high-quality Grand Rock elbows in various sizes, so it's easy to find the proper fit.EGR Flex BellowsYour exhaust gas recirculation, or EGR, flex bellows take on vibration, parts movement, and thermal expansion. You can't replace them with just any flex hoses, or you risk leaks in high-temperature areas that face significant stress.Opt for Grand Rock flex bellows in various sizes, constructed from multiple layers of stainless steel to prevent leaks and withstand harsh conditions. They get the job done right, transporting your exhaust from the manifold to the EGR valve or through your cooler for recirculation.Shop Truck Pipes USA for Quality and Top-Rate ServiceThe Grand Rock exhaust parts and other products we sell adhere to IATF 16949:2016 quality standards, so you can shop with confidence. If you need help finding what you're looking for or have questions, our customer service and sales teams are U.S.-based, knowledgeable, and always ready to help.Don't let faulty mufflers or other exhaust components reduce your uptime and hurt your business. Shop our wide selection of over 2,000 industry-respected Grand Rock products to keep your exhaust system operating smoothly.