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Aftermarket Diesel Oxidation Catalyst (DOC) designed for Cummins X12 and X15 engines. This direct-fit replacement is compatible with OEM part number 4394855 and related cross-reference numbers. The DOC is designed to support the diesel aftertreatment system by helping oxidize hydrocarbons and carbon monoxide in the exhaust stream.
The Cummins X12 & X15 DOC is a direct-fit aftermarket Diesel Oxidation Catalyst designed for compatible heavy-duty diesel exhaust aftertreatment systems. It cross-references OEM part number 4394855 along with several related Cummins numbers, including 4394855RX, A055N645 and 5509698.
The Diesel Oxidation Catalyst (DOC) is an important component of the diesel exhaust aftertreatment system. Exhaust gases pass through the DOC, where oxidation reactions help reduce hydrocarbons and carbon monoxide before the exhaust continues through downstream aftertreatment components.
The Cummins X12 & X15 DOC is a Diesel Oxidation Catalyst designed for compatible heavy-duty diesel engines. It is used within the exhaust aftertreatment system to help oxidise hydrocarbons and carbon monoxide in the exhaust stream.
This DOC is designed as an aftermarket replacement for Cummins OEM part number 4394855. Always verify the OEM number, engine model and application before ordering.
This Diesel Oxidation Catalyst is designed for compatible Cummins X12 and X15 diesel engines. Vehicle and engine configuration should be checked to confirm exact fitment.
A DOC uses a catalyst-coated substrate to promote oxidation reactions in the exhaust system. It helps convert hydrocarbons and carbon monoxide into less harmful compounds as exhaust gases pass through the catalyst.
This product is offered as an aftermarket replacement for 4394855. Because exhaust configurations can vary by vehicle and model year, confirm the part number and physical configuration before installation.
The DOC assembly uses stainless-steel construction designed for heavy-duty diesel exhaust applications and exposure to elevated exhaust temperatures.
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