Product Overview
Aftermarket DOC Replacement for Cummins 4396734 / PACCAR Q622230 DOC Filter
Interchangeable Component Configurations: 4396734 | Q622230 | 2880259 | 4969721 | 2888262 | A030X734
Restore commercial fleet emissions performance with this premium aftermarket Cummins 4396734 / PACCAR Q622230 DOC Inlet Module Replacement Kit. This brand-new Diesel Oxidation Catalyst (DOC) functions as a direct-fit alternative to high-traffic OEM numbers 4396734, 2880259, 4969721, 2888262, A030X734, Q622230, 4965079, A029D892, Q165486, A030N300, Q620939, 4396734NX, 4396734RX, 2880259NX, 2880259RX, 4969721NX, 4969721RX, 2888262NX, and 2888262RX. Engineered as a genuine OE manufactured component replacement for heavy-duty EPA10 emissions modules running Cummins ISX15 engine platforms, it requires no exhaust system modifications for installation, carries zero core charge, and ships free within the continental United States.
Cross-References for Cummins / PACCAR 4396734
Instant Fitment Verification: This direct-fit replacement diesel oxidation catalyst replaces components stamped with housing part numbers, casting codes, or tag profiles matching any of the interchangeable manufacturing references listed below:
| Manufacturer | Cross Reference Part Numbers |
|---|---|
| Cummins | 4396734, 4396734NX, 4396734RX, 2880259, 2880259NX, 2880259RX, 4969721, 4969721NX, 4969721RX, 2888262, 2888262NX, 2888262RX, 4965079, A029D892, A030N300 |
| PACCAR | Q622230, Q165486, Q620939 |
| Roadwarrior | C0016-ID |
| DuraFit | C20-0020 |
| Dinex | 58017 |
| Global Emission Systems | GESi-514 |
Choose the Setup That Fits Your Shop’s Needs
Select the setup from the product options above that best fits your shop's needs:
- Full Kit (Best Value): Includes (1) Brand-New Oxidation Catalyst, (1) 2871453 inlet gasket, (1) 2866337 outlet gasket, (1) 2871863 heavy-duty mounting clamp, and (1) 2880483 premium exit clamp.
- Component Only: Includes the replacement oxidation module core only. Service gaskets and mounting clamps are not included.
TECHNICAL SPECIFICATIONS
| Measurement Parameter | Specification Value |
|---|---|
| Material Base Construction | Premium Stainless Steel |
| Net Assembly Weight | 42.47 lbs (19.28 kg) |
| Overall Length | 13.15 inches (334.00 mm) |
| Core Diameter | 13.17 inches (334.00 mm) |
| Component Dimensions (W x H) | 13.15 x 15.16 inches (334.00 x 385.06 mm) |
| Exhaust Emissions Norm | EPA10 Compliant |
Key Features
- Proudly Built in the USA: Designed, engineered, and manufactured in America.
- EPA Compliant: Meets federal emission standard regulations for heavy-duty vehicle particulate reduction criteria nationwide.
- No Core Charge: Brand-new component; completely eliminates dirty core returns, core log documentation tracking, and core bank delays.
- Exact-Fit™ Design: Engineered as a genuine OE manufactured component alternative; 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.
- Fast Free Shipping: Free ground freight within the continental United States. Orders confirmed before 2:00 PM Eastern ship out the same business day.
- Warranty Protection: Supported by a comprehensive 3-year unlimited mileage coverage profile.
Engine Compatibility & Fitment Guide
Direct alternative replacement solution for heavy-duty regional transportation and Class 8 commercial vehicles configured with horizontal chassis layouts under approximate model years 2010 to 2012. Optimized for:
- Engine Platforms: High-performance Cummins ISX15, Cummins ISX, and Cummins QSX 15-liter powertrain blocks.
- Compatible OEM Master Assembly Numbers: 4964989, 4969649, 4969733, 4969736, 4969737, 4985348
- Chassis Fitments: Extensively deployed across key major transportation configurations matching factory line indexes:
- Kenworth Applications: Conventional builds including T660, T800, T2000, and W900 architectures.
- Peterbilt Applications: Heavy transport layouts including models 386, 388, 389, and 367 chassis setups.
- Freightliner Applications: Premium line-haul setups including Cascadia and Coronado frameworks.
- International / Navistar Applications: Fleet line configurations matching ProStar and 9900i platforms.
- Western Star / Volvo / Mack Applications: Severe duty vocational series built on the 4900 and 6900 Series frameworks, and select over-the-road fleets optioned with matching Cummins engine builds.
Frequently Asked Questions
Is there a core charge for this aftermarket emissions unit?
No, this is a 100% brand-new aftermarket component. Unlike remanufactured factory units, there is absolutely zero core charge, zero tracking paperwork required, and no need to spend money shipping your old, dirty unit back to us.
Does this replacement unit come with the necessary clamps and gaskets?
When you select the "Full Kit" option from the dropdown on this page, all exact-fit installation gaskets (2871453 / 2866337) and heavy-duty alignment clamps (2871863 / 2880483) required for a complete exhaust installation are bundled and shipped directly with the assembly. Selecting the component-only option provides the bare unit without hardware.
How fast will my order ship out?
Orders confirmed before 2:00 PM Eastern standard time ship out from our closest regional fulfillment hub on the exact same business day. Free standard ground shipping is included to the continental United States, and expedited overnight air choices can be selected directly at checkout.
How do I verify this aftermarket filter matches my truck's setup?
You can verify fitment by identifying the original casting, housing, or tag stamp directly on your factory exhaust unit canister shell. If that number matches any of the cross-references listed on this page, or if your engine model and year line up with our application guide, it will bolt directly in with a perfect factory alignment.
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 4396734 / 2880259 / 4969721
- Raw fuel oil weeping from exhaust line down-pipes or heavy face mask scaling across the internal catalyst face assembly
- Active dashboard diagnostic trouble codes (DTCs) flashing engine alerts for low catalyst conversion capabilities or thermal lag responses across codes matching 4396734 and Q622230
- Frequent soot face-plugging delays inside the downstream DPF filter canister indicating an active failure in upstream washcoat thermal output
*Note: Always verify exact vehicle compatibility using your vehicle's VIN number, emissions family descriptor tag, or the original stamped OEM part number on your catalyst module casing before placing an order.
Disclaimer: Product images are for reference only. Final replacement hardware items matching OEM parameters such as gaskets, clamps, and sensor ports depend on your kit configuration. Selecting the "Full Kit" option adds the explicitly listed installation components to your shipment. Price is for (1) DOC. Shipped in a plain utility package setup.
