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Thomas Built School Bus Exhaust Parts

HDX, C2, and EFX

Auto-jet manufactures Thomas Built school bus exhaust parts for Saf-T-Liner HDX, C2, and EFX body styles. Thomas Built is one of the most common school bus brands in North American fleets. Fitment varies significantly between body styles, so confirm your body style before ordering.

Thomas Built School Bus Exhaust Parts by Body Style

Saf-T-Liner HDX is the most common Thomas Built configuration. Across Thomas Built applications Auto-jet covers Cummins B-Series, ISB, ISC and 6BTA, Caterpillar 3208, 3126 and 3116, and Mercedes-Benz MBE engines. Bracket location and outlet angle changed with the 2007 emissions update.

Saf-T-Liner C2 is a lower-floor, shorter chassis than the HDX with different routing. HDX parts do not fit the C2.

Saf-T-Liner EFX is rear-engine, with exhaust routed to the rear. It uses EFX-specific part numbers only. Thomas Minotour bodies are built on Chevrolet and GMC cutaway van chassis. Those fitments are covered on the Chevrolet and GMC school bus exhaust parts page.

Thomas Built School Bus Exhaust Parts We Stock

  • Tailpipes, the largest Thomas Built category, fitment-specific by body style

  • Front pipes, turbo outlet to muffler inlet

  • Turbo pipes, turbocharger to front pipe

  • Mufflers, fitment-specific by body style and engine

  • Coolant tubes and charge air cooler tubes

  • Hangers and brackets for the HDX mid-chassis mount, confirm pre or post 2007

  • Over axle pipes, front and rear

  • Flex tubing and bellows for engine-to-chassis connections

  • Fuel tanks and radiators, beyond the exhaust system

226 of Auto-jet's 277 Thomas Built part numbers list the OE number they replace.

How to Identify the Right Thomas Built Exhaust Part

Body style (HDX, C2, or EFX), model year, and engine. The 2007 emissions update changed bracket locations and outlet angles on the HDX. HDX and C2 parts are not interchangeable. When in doubt, call 800-247-5391.

Frequently Asked Questions

Are Thomas Built HDX and C2 exhaust parts interchangeable?

No. Different chassis dimensions, different bracket locations. Confirm body style before ordering.

Are Thomas Built school bus exhaust parts in stock?

Yes. Auto-jet stocks Thomas Built exhaust parts with same-day shipping from Clive, Iowa on most items.

What information do I need to order a Thomas Built exhaust part?

Body style, model year, and engine. Have those ready and call 800-247-5391 for a same-day quote.

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