Aftermarket Diesel Oxidation Catalysts DOC for Medium and Heavy Duty Trucks

DPFXFIT™ aftermarket diesel oxidation catalysts (DOCs) are direct-fit replacements for the most common medium and heavy-duty diesel truck platforms on the road today, including Cummins, Volvo Mack, Navistar International, and Paccar engines. Designed and manufactured in North America by GESi®, with over 20 years of emissions manufacturing experience, every DPFXFIT DOC delivers OEM performance and durability with aftermarket affordability.

Each unit features an exclusive stainless steel canister design, substrates from Tier-1 OEM suppliers, and ships complete with OEM-quality clamps and gaskets. Search for your OEM or Aftermarket part number, or call 1-888-758-4374 to confirm your application.

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