Aftermarket Heavy-Duty DOC Replacement Solutions

DPFXFIT™ aftermarket diesel oxidation catalysts (DOCs) deliver reliable, OEM-spec performance for heavy-duty diesel engines. Engineered for direct-fit replacement, our aftermarket DOCs optimize CO and HC oxidation, extend service life, and help maintain emissions compliance under the toughest duty cycles.

Compatible with Cummins, Volvo, Mack, Navistar, and other heavy-duty diesel platforms, DPFXFIT™ DOC replacements provide a durable, high-performance solution you can trust.

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