4" Exhaust Diffuser Tip
The history of Thomas Built Buses reads much like the history of modern mass transportation. It begins in 1916 in the small North Carolina city of High Point. Economic hard times created by World War I forced the closing of Southern Car Works, a major streetcar manufacturer based in High Point. Canadian-born car designer Perley A. Thomas lost his job as chief engineer for the company, but a few months later was contacted by Southern Public Utilities Company and asked to consider putting together a crew to renovate several streetcars he had designed for his former employer.
Within weeks, Thomas had reassembled many of his former coworkers, purchased a building in downtown High Point and opened the Perley A. Thomas Car Works. Thomas' reputation in the industry opened doors nationwide and within a few years, Thomas-built streetcars were carrying passengers in many of North America's largest cities.
Today, there are many buses on the road that need aftermarket exhaust pipes, and we have what you need. All of our Aftermarket Thomas Bus exhaust pipes are an exact match to the OEM number.
We offer the largest variety of Thomas Bus exhaust systems for sale online.
All of our Aftermarket Thomas Bus exhaust systems deliver the exact same performance that the OEM offers, but our Thomas Bus Exhaust Parts are sold at a much lower price.
Thomas Aftermarket Bus Exhaust systems are designed and fabricated in the USA.
We make the online buying process easy for you. Simply add the item to your cart and check out on our ULTRA secure Payment processor. We ship the exhaust parts direct to you.
Browse the Catalog below by Clicking on the Picture.
Don't pay full retail for your Thomas Bus or Truck Exhaust!!
Shop online with us and SAVE!!
Grand Rock 1-Year Warranty
This product is covered by a 1-year warranty from the date of purchase.
In the rare event that a product does not perform as expected, Grand Rock warrants its products against failure due to defects in materials and workmanship for the period specified under Terms and Conditions for the particular part. Grand RockÂ’s obligation under this warranty covers replacement of the failed part, including transportation charges. Grand Rock is not responsible for labor costs. Please note that, due to the higher heat output of Emissions Components, Grand Rock cannot warrant the Chrome Plating for any item installed on any truck made after 2007.
The Length of Warranty for replacement parts provided under warranty coverage is the balance of the warranty period reÂmaining on the part being replaced. It is important that the customer handles, stores, and installs all products properly. This warranty does not cover failure due to misapplication, misuse, abuse, neglect, rust through and corrosion (muffler), imÂproper service practices or non-approved modification. If you have any questions about proper handling, storing or installation do not hesitate to contact Grand Rock.