Technical Info Help
No one in the industry has staff more focused on complete customer satisfaction than we do! From our engineers, designers, fabricators, quality inspectors, and packers to our sales managers and executives - we are all focused on one thing - PROVIDING PREMIUM EXHAUST SYSTEMS! We don't make filters, mud flaps, hangers or lights - we make exhausts!

The result is the highest quality exhaust systems in the industry and the best selection of components. When you E-mail or call us for technical assistance, you get answers - not someone's voice mail. We aim to make it easy for you to get the right products, answers and information - so you can get on to more important things - keeping trucks on the road with quality parts!

For technical inquiries about exhaust, please contact us Monday-Friday 8:00 AM - 6:00 PM EST by the following methods:

Call: (440) 639-2000, or TOLL-FREE (N. America): (800) 321-3674

Or Email us: technicalinfo@grandrock.com