Free Ground shipping within the continental USA. Other options, including overnight, are available at checkout. We ship from several warehouses located throughout the USA. Orders placed after 2:00pm Eastern time will ship next business day
Warranty:
Skyline Emissions, Inc offers a 3-year, unlimited mileage warranty on all their DPFs and DOCs
California Orders:
Like ALL aftermarket DOCs, this item cannot be shipped to California. Please contact us if you are not sure this is the correct replacement. See our Shipping – Returns – Cancellations Policy in the top menu above
Have questions? Call an expert at 760-355-8900, 9am - 9pm EST
Choice of Kits – With Gaskets and Clamps – DOC only, No Gaskets or Clamps
Gasket and Clamp Kit include (2) 2871452 gaskets and (2) 2871862 clamps
Free Ground Shipping within the continental USA
American Quality: This DOC is designed and manufactured in the USA, adhering to the highest industry standards for emissions control and hardware durability.
3-year unlimited mileage Warranty
Stainless Steel Housing with Premium Substrate ensures maximum soot collection and effective regeneration cycles.
EPA Compliant - This filter fully complies with Federal emission standards, ensuring your vehicle meets EPA requirements for particulate matter reduction.
Engine Protection: Reduces backpressure to prevent engine strain, helping you avoid costly derate conditions and maintaining fuel efficiency
Skyline Exact-Fit Technology: Eliminates the need for modifications; this kit is designed for a "drop-in" fit that matches factory mounting points and sensor ports
Normally used for Cummins ISC 8.3, Cummins ISL 8.9 and Paccar PX-8 and Paccar PX-6 Engines Model years 2007 to 2012
Common Vehicle Makes: Peterbilt 337 and 348 – Kenworth T370 and T440 – Freightliner M2 106 and 112 – International DuraStar and Sterling -Various Class A Motorhomes – Blue Bird and Thomas Built buses
Like all aftermarket units, this Skyline Cummins DOC cannot be shipped to California.
Skyline’s Cummins Q621275 DOC Filter is a premium emissions solution engineered to provide a direct, high-performance replacement for your medium-duty engine's aftertreatment system. Our heavy-duty aftermarket Cummins Q621275 DOC filter features the advanced Skyline Exact-Fit™ design, ensuring that every unit matches the original equipment geometry for a seamless installation without the need for additional modifications.
Keep your fleet’s emissions system running at peak performance with this direct-fit Diesel Oxidation Catalyst (DOC) from Filter Service and Supply. Engineered to meet or exceed OEM specifications, this aftermarket unit is a high-performance alternative to Cummins Q621275 DOC Filter Kit original equipment part numbers.
Price is for one Q621275 DOC Inlet Module; pictures are for reference only. Please contact us if you have any questions or are not sure if this is the correct replacement.