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 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.
Donaldson Company is a vertically integrated filtration company engaged in the production and marketing of air filters used in a variety of industry sectors, including commercial/industrial, aerospace, chemical, alternative energy and pharmaceuticals.