DPF Comp

Shop Diesel Exhaust Aftertreatment Parts

Find replacement diesel particulate filters, oxidation catalysts, and complete aftertreatment assemblies for heavy-duty trucks. Shop parts for Cummins, Detroit Diesel, Caterpillar, PACCAR, International, Volvo, and Mack engines.

Diesel Particulate Filters (DPFs)

DPFs capture soot from diesel exhaust to reduce particulate emissions. Choose from aftermarket replacement filters, including one-piece stainless steel assemblies from BESTfit, Global Emissions, and Dayton/Dorman.

Diesel Oxidation Catalysts (DOCs)

DOCs use a catalyst to reduce carbon monoxide and unburned hydrocarbons in diesel exhaust. They also help generate heat for DPF regeneration in compatible aftertreatment systems.

Complete DPF & Aftertreatment Assemblies

Replace multiple emissions-control components with complete aftertreatment assemblies, including Detroit Diesel 1-Box systems for DD13 and DD15 engines. Verify your OEM part number and exhaust configuration before ordering.

Semi Truck DPF Filters

Shop replacement DPF filters for Cummins ISX, ISC, ISL, and ISM; Detroit DD13, DD15, and Series 60; Caterpillar C7, C9, C13, and C15; and select PACCAR, International, Volvo, and Mack engines. Match your engine model, emissions system, filter dimensions, and OEM replacement number to confirm fitment.

DPF Replacement Parts & Hardware

Find replacement gaskets, clamps, seals, sensors, and injectors for servicing diesel exhaust aftertreatment systems.

DPF Gaskets, Clamps & Seals

Seal and secure DPF connections with replacement exhaust gaskets, V-band clamps, Marman seals, and mounting hardware. Choose parts by OEM number, connection diameter, and engine application.

DPF Sensors & Doser Injectors

Replace faulty differential pressure sensors, particulate sensors, and hydrocarbon doser injectors. These components help monitor exhaust conditions and support DPF regeneration in compatible systems.