Detroit DD15 / Series 60 A6804901214, A6804903014, A1684901792 Aftermarket DOC Kit

Restore commercial fleet emissions performance with this premium Skyline aftermarket Detroit Diesel A6804901214 / A6804903014 / A1684901792 Diesel Oxidation Catalyst (DOC) Inlet Module Replacement Kit. Built as a direct replacement for your factory unit, this brand-new flow-through catalyst module serves as a direct counter-part to OEM cross-references A6804901214, A6804903014, A1684901792, EA6804901214, RA6804901214, DDE A6804901214, DDE EA6804901214, and DDE RA6804901214. Engineered for an exact fit, with no installation modifications required, it installs cleanly into the factory exhaust setup, carries zero core charge, and ships free within the continental United States.

Detroit Diesel Cross Reference

How to Verify Your Unit: This direct-fit replacement replaces components stamped with housing numbers, casting codes, or tag profiles matching any of the interchangeable manufacturing references listed below:

Choose Your Kit Configuration

Select the setup from the product options above that best fits your shop's needs:

• Full Kit (Best Value): Includes (1) Brand-New Component, (1) exact-fit gasket (A4709970045), (1) exact-fit gasket (A4709971245), (1) heavy-duty clamp (A4709950002), and (1) heavy-duty clamp (A0019959702).
• Component Only: Includes core unit only. Hardware items excluded.

Key Features for Skyline DOC Catalysts

• Proudly Built in the USA: Designed, engineered, and manufactured in America.
• No Core Charge: Brand-new aftermarket component; completely eliminates dirty core tracking and return hassles.
• Exact-Fit™ Technical Dimensions: Built with matching inlet/outlet outer diameters, pre-machined sensor ports, and specialized body hanger brackets for zero exhaust system modifications.
• Substrate Performance Matrix: Advanced flow-through catalyst core uses verified washcoat metal loading to sustain exhaust temperature control and lower backpressure limits.
• Industry-Leading Warranty: Backed by an extensive 3-year unlimited mileage coverage matrix.
• EPA Compliant: Meets all federal emissions standards for legal installation nationwide.
• Fast Free Shipping: Free standard ground freight within the continental United States. Orders confirmed before 2:00 PM Eastern ship out the same business day. Overnight and expedited shipping options are available at checkout.

Vehicle Fitment Guide

Direct alternative solution for approximately 2007 to 2009 model year trucks running heavy-duty transportation and chassis configurations with horizontal architectures:

• Engine Platforms: Detroit Diesel Series 60, Detroit Diesel DD13, Detroit Diesel DD15, and Mercedes-Benz MBE 4000 powertrain blocks.
• Freightliner Applications: Premium commercial truck frameworks including Cascadia, Coronado, Columbia, and Century Class platforms.
• Western Star Applications: Vocational setups matching 4900 series fleets.
• Sterling Applications: Heavy transport series optioned with the MBE 4000 layout.
• Coach & Bus Systems: Select Thomas, school bus, and transit motorcoach chassis configurations running the Series 60 or Mercedes MBE powertrain modules.

Compatible OEM Master Assembly Numbers: A6804901492, A6804901592

Signs Your Diesel Oxidation Catalyst (DOC) Needs Replacement

• Frequent, unprompted, or incomplete DPF regeneration cycles linked directly to upstream catalyst efficiency degradation matching part numbers A6804901214 / A6804903014 / A1684901792
• Excessive particulate soot face-plugging or heavy face mask scaling across the internal catalyst face assembly
• Active dashboard diagnostic trouble codes (DTCs) pointing directly to poor catalyst conversion efficiencies or thermal response delays
• Unexplained commercial engine backpressure spikes or noticeable horsepower deterioration under loaded trailer pulls

*Note: Always verify exact vehicle compatibility using your vehicle's VIN number, emissions family descriptor tag, or the original stamped part number on your catalyst unit casing before placing an order.

Disclaimer: Product images for reference only. Hardware depends on configuration. Price is for (1) unit. Inventory levels are subject to local availability updates. Selecting the "Full Kit" option adds the explicitly listed installation components to your shipment.