Exhaust

PACCAR Diesel Oxidation Catalyst By BESTfitEnsure dependable emissions control with the BESTfit PACCAR DOC for EPA10 engines. Replacing part numbers 1837302 and 1998412PE, this heavy-duty diesel oxidation catalyst is engineered for durability and...

CAT Diesel Particulate Filter By BESTfitMaximize emissions efficiency and reliability with the BESTfit CAT Diesel Particulate Filter (DPF), designed as a direct replacement for part numbers 20R3511, 4373512, and 4373518 for Caterpillar engines. Built...

Detroit Diesel 1-Box Assembly By BESTfitEnsure maximum emissions efficiency with the BESTfit Detroit Diesel 1-Box Assembly for DD13 and DD15 engines. Replacing OEM part numbers 35030, 2140200007, and C0313FL, this heavy-duty aftertreatment system is...

Cummins Diesel Oxidation Catalyst By BESTfitEnsure dependable emissions control with the BESTfit Cummins DOC for ISB engines. Replacing part numbers 5287474NX, C0119ID, and A035H173, this heavy-duty diesel oxidation catalyst is engineered for durability...

Cummins Diesel Oxidation Catalyst By BESTfitEnsure dependable emissions control with the BESTfit Cummins DOC for ISM engines. Replacing part numbers 4965054, 58039, and C200017, this heavy-duty diesel oxidation catalyst is engineered for durability and...

Cummins Diesel Particulate Filter By BESTfitMaintain peak emissions performance with the BESTfit Volvo/Mack Diesel Particulate Filter (DPF), designed as a direct replacement for part numbers 20864316, AVQ1204, and OTR0151048 for Volvo/Mack MP8 engines...

Volvo/Mack Diesel Oxidation Catalyst By BESTfitEnsure optimal emissions control with the BESTfit Volvo/Mack DOC for D13 engines. Replacing part numbers 85001355, C009ID, and VNB402, this durable diesel oxidation catalyst is built with a strong steel...

Cummins Diesel Particulate Filter Gasket By BESTfitMaintain peak emissions system performance with the BESTfit Cummins DPF Gasket, a direct replacement for part numbers 2871566, G02008, and KPI60004G for Cummins engines. This premium diesel particulate...

CUmmins Diesel Particulate Filter Gasket By BESTfitMaintain peak emissions system performance with the BESTfit Cummins DPF Gasket, a direct replacement for part numbers 21371339, AP70311, and E300127 for Volvo and Mack D11, D13, D16, and MP8 engines...

Cummins Dieself Oxidation Catalyst By BESTfitBuilt for durability and performance, the BESTfit Cummins ISC/ISL Diesel Oxidation Catalyst (DOC) replaces OEM part numbers 2880588RX and 58221. This emissions component is designed to reduce harmful exhaust...

Detroit Diesel DPF Gasket By BESTfitMaximize peak performance and prevent exhaust leaks with the BESTfit Detroit Diesel DPF Gasket, replacing OEM part numbers 2060209005, 21424458, and ENVGDD0510. This high-quality gasket creates a tight seal between DPF...

CAT Diesel Particulate Filter By BESTfitUpgrade your Caterpillar engine's emissions system with the BESTfit CAT DPF, a premium replacement for OEM part numbers 20R0697, 20R5621, and 20R8028. Designed for heavy-duty use, this DPF captures harmful soot...