Products by Grand Rock Co

Replacing your old OE pipe can be expensive! Search Grand Rock's extensive inventory pf replacement parts and find the part you need for any major brand OE system. New truck, old truck or custom truck, We have what you need.

Do you need to replace your exhaust system or repair a leak before inspection? Do you have an end of the school year maintenance project? Grand Rock has an extensive line of bus exhaust parts, giving you the assurance you need that the parts will exceed your expectations and arrive when you...

For class 4-6 trucks, Grand Rock has introduced a line of exhaust components covering popular Chevy/GMC, Ford, Freightliner, International, and Kenworth applications.

Covering diesel pickup applications from Ford, GM, and Dodge, GRAND ROCK makes high-performance single stock-exit systems, as well as the finest single and dual in-bed stack kits on the market. Application years range from 1994-2006 for the single under vehicle stock-exit kits, and can fit all...