Keep your bus, truck and diesel equipment fleet running longer with catalytic mufflers from DieselTech™. Catalytic mufflers from DieselTech™ are built for long service life and include a diesel oxidation catalyst to effectively reduce hydrocarbons, carbon monoxide and diesel smoke/soot. DieselTech™ provides catalytic mufflers for popular heavy duty diesel applications that include: Bluebird Bus, Freightliner, Cummins, International and other applications.

  • Built-in diesel oxidation catalyst (DOC)
  • Direct replacement OEM units
  • Effectively reduces hydrocarbons, carbon monoxide & diesel smoke/soot
  • Similar sound performance to OEM mufflers
  • Meets or exceeds all applicable EPA requirements*

Both our DieselTech™ catalytic mufflers and standard heavy duty diesel mufflers are direct-fit replacements that provide equivalent or improved performance over OEM units. All our parts are designed, built and tested in the USA, meet all applicable EPA standards* and the needs of OBD II equipped vehicles. Our parts are covered by our 5 year / 50,000 mile warranty on converter body, and 25,000 mile warranty on emissions.

To find parts for Bluebird Bus, Freightliner, Cummins, International and other applicatons , please refer to our applications page. To answer any questions, or find a dealer near you, please visit our Where to Buy page.

Footnote: *Certain emission control parts are not legal for sale or use in California or areas requiring compliance with California emissions regulations. Ask your DieselTech™ dealer for more detail or contact us.

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