Grand Rock Truck Exhaust Systems - Performance Exhaust, Performance Exhaust System, Diesel Performance Exhaust, Heavy Truck Exhaust, Performance Muffler, Quiet Performance Muffler, High Performance Muffler, Truck Muffler, Exhaust Muffler, Diesel Performance, Powerstroke Diesel Performance, Duramax Diesel Performance, Cummins Diesel Performance, Powerstroke Diesel Exhaust, Dodge Cummins Exhaust, Duramax Diesel Exhaust, Westfalia Part

OEM Replacement Parts,
Custom Exhaust Parts and Mufflers

Quiet Performance Muffler, 3% Minimum MPG Gain Guaranteed both Standard Mufflers & Inserts for Straight Pipes.

State-of-the-Art Flexible Exhaust Hose and Preformed Seal Clamp Systems

Powerflow Exhaust System for Ford Powerstroke, Dodge Cummins and GM Duramax diesel pickup trucks

WELCOME TO GRAND ROCK TRUCK EXHAUST SYSTEMS

GRAND ROCK CO is a 30 year young manufacturer of Diesel Truck exhaust systems. We are housed in a modern 53,000 sq ft building just east of Cleveland, OH.

We have OEM Replacement Parts for Kenworth, Peterbilt, Mack, Ford, Western Star, International, Volvo and Sterling.

We fabricate from 3 to 7" dia tubing in plain, aluminized and chrome, we also can powder and ceramic coat parts if needed. We custom make to your specs also, not just out catalog parts.