Cummins / PACCAR 4353304, 5302769, A047V505 DOC Inlet Catalyst Replacement

Restore commercial fleet emissions performance with this premium Skyline aftermarket Cummins / PACCAR 4353304 / 5302769 / A047V505 Diesel Oxidation Catalyst (DOC) Inlet Module Replacement. Also acting as a high-efficiency direct-fit DOC filter alternative, this brand-new flow-through catalyst module serves as a direct counter-part to OEM cross-references 4353304, 5302769, A047V505, A042M251, 4353304NX, 4353304RX, 5302769NX, and 5302769RX. 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.

Cummins / PACCAR Cross Reference

How to Verify Your Unit: This direct-fit replacement catalyst replaces components stamped with housing, casting, or manufacturing tags matching any of the interchangeable assembly numbers or supplier cross-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) installation gasket (2871452), (1) installation gasket (2880214), (1) heavy-duty clamp (2871862), and (1) heavy-duty clamp (2880212).
• Component Only: Includes core unit only. Hardware items excluded.

Key Features for Skyline DOC Filters

• 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: Advanced flow-through catalyst core features optimized precious metal washcoat loading to maintain optimal exhaust temperatures, regulate low backpressure limits, and sustain downstream emissions control.
• Industry-Leading Warranty: Backed by an extensive 3-year unlimited mileage coverage matrix.
• EPA Compliant: Meets federal emissions standards for applicable particulate matter reduction and hydrocarbon oxidation requirements nationwide.
• Fast Free Shipping: Free ground freight within the continental United States. Orders confirmed before 2:00 PM Eastern ship out the same business day.

Vehicle Fitment Guide

Direct alternative solution for approximately 2013 to 2016 model year vehicles running commercial transportation and vocational architectures with horizontal chassis exhaust configurations:

• Engine Platforms: Cummins ISL 9 / PACCAR PX-9 (8.9L Inline-6 Heavy-Duty Diesel)
• PACCAR Applications: Heavy-duty and medium-duty commercial transport layouts running the PX-9 hardware matrix (2013-2016).
• Cummins Applications: Regional transportation, transit, and vocational Class 8 asset lines running the ISL 9 architecture (2013-2016).

Compatible OEM Master Assembly Numbers: 5302471, 5306969, A041K997, A042P825

Signs Your Diesel Oxidation Catalyst (DOC) Needs Replacement

• Unprompted dashboard diagnostic trouble codes (DTCs) pointing directly to poor catalytic conversion efficiencies or upstream temperature sensor faults.
• Excessive HC (hydrocarbon) mask face-plugging, raw diesel washing, or heavy carbon scaling across the internal honeycomb channels.
• Unexplained commercial engine backpressure spikes or noticeable horsepower deterioration under loaded trailer pulls.
• Inability of downstream DPF filter components to achieve full regeneration temperatures due to inadequate heat generation across the catalyst cell assembly.

*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.