Let's Fix Your Diesel Today!

Call Now  715-254-2307

Owner, Gary Nilsen, will answer your diesel parts question when you call.


Grand Rock Manufacturing 

Heavy Duty Commercial Grade Stack Exhaust Reducers and Couplers, Clamps

Aluminized Steel Reducers and Couplers

Chrome Plated Reducers and Couplers also available; some are Custom/Made to Order parts