Contact Us

Finding or Becoming a Distributor

Grand Rock Company is a premium supplier of exhaust parts for Class 8 Heavy Duty Trucks, along with offering exhaust solutions for other classes of trucks including school bus applications. We are a global company selling our products world-wide!

To find a distributor or dealer near you

Thinking about becoming a leader in exhaust products? Want to be a dealer or distributor for Grand Rock? We can put you in contact!


Technical Info & Support

Have questions on Grand Rock exhaust products? Grand Rock’s technical team can assist you with most questions regarding our product line. Contact us with any questions you might have, be sure to have your OE or other Part number(s) handy if we are assisting you with cross referencing parts to Grand Rock part numbers. You can also search for cross reference information on the website by using our search bar. Grand Rock account holders can log in into your accounts and access the cross-reference worksheet if you are searching for more than one item.

You can also reach our technical department Monday-Friday 7:30am – 4:00pm

Get in touch here!

Call (440)639-2000
select option 5 when prompted.

Toll-Free 800-321-3674
select option 5 when prompted.

Request Literature

As Grand Rock proceeds to continue to improve and makes environmental efforts, we will reduce the number of printed catalogs and flyers each year., we do not print mass amounts of flyers, brochures, or catalogs. If you are looking for a physical catalog you can always request that Grand Rock send one with your next stocking order. You can also see what catalogs we offer online with your Grand Rock account log in. While logged in you can find and download any of the flyers that are there as well!

If you need to contact us to have catalogs sent to you do so by emailing us!


Throughout its history, Grand Rock Co has enjoyed a great and stable team of associates who, today, enjoy over 10+ years of average tenure. Grand Rock Co. is always looking for the best team players to support our growth. We offer competitive wages, a full benefits package to include medical, dental, 401(k) and profit sharing.

Grand Rock Co. differentiates itself by encouraging, developing, and rewarding the outstanding efforts of its people – not just a few, but all its people driving for the same goal to Exceed Customer Expectations.

If this sounds like you, we invite you to become part of our growing team!

Become part of the team!

How to Contact Us.

If you would like to contact specific departments use the following email address.

Sales Team:

Customer Service (CSR):

Technical Help:

Human Resources (HR):

To email/submit Order:

Returns & Warranty:

You can also find us here!

Grand Rock Co., Inc.

395 Fountain Ave.

Painesville, Ohio 44077

Phone: 440-639-2000

Toll Free: 800-321-3674 (US & Canada)