DPFXFIT™ – GESi-508 aftermarket DOC for Cummins is a direct-fit replacement filter for ISX diesel engine platforms. Engineered to replace OEM 3999660 and more. These diesel oxidation catalysts deliver consistent hydrocarbon and CO oxidation while supporting durable emissions system performance.
Design Advantages
•Designed and built in North America
•Exclusive 1-piece stainless steel canister design for durability
•DOC Cordierite Substrate manufactured by Tier-1 OEM suppliers
• OEM-quality clamps and gaskets included
• Exact-fit direct replacement
• 3-year unlimited mileage warranty
