Product Overview
Aftermarket DOC for Cummins 5287491 / 4965352 / A035H299 Assemblies
Interchangeable Component Configurations: 5287491 | 5287491NX | 5287491RX | 4965352 | 4965352NX | A035H299 | Q621560 | Skyline CJ0403
Cummins OEM Cross Reference
Verify Your Unit: This direct-fit replacement diesel oxidation catalyst replaces parts stamped with housing numbers, casting codes, or tags matching any of the interchangeable manufacturing references listed below:
| Manufacture | Cross Reference Part Numbers |
|---|---|
| Cummins / Paccar OEM | 5287491, 5287491NX, 5287491RX, 4965352, 4965352NX, A035H299, Q621560 |
| Skyline | CJ0403 |
| Roadwarrior | C0117-ID |
| DuraFit | C20-0016 |
| FSS Emission Products | CJ0403-FSS |
| Global Emission Systems | GESi-515 |
Restore commercial fleet emissions performance with this premium Skyline aftermarket replacement kit for Cummins OEM DOC parts 5287491, 4965352, and A035H299. This brand-new Diesel Oxidation Catalyst (DOC) serves as a direct-fit alternative to your commercial fleet's factory setup. Engineered as an exact-fit replacement for heavy-duty systems running Cummins ISC and Paccar PX8 engine platforms, it requires no exhaust system modifications for installation, carries zero core charge, and ships free within the continental United States.
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 Unit, (1) 2871452 Aftermarket Exhaust Gaskets, (1) 2866636 Aftermarket Exhaust Gaskets, (1) 2871862 Heavy-Duty Clamps, and (1) 2880482 Heavy-Duty Clamps.
- DOC Only: Includes the replacement component only. Installation gaskets and clamps are not included.
Technical Specifications
| Measurement Parameter | Specification Value |
|---|---|
| Material | Premium Stainless Steel |
| Weight | 39.69 lbs (18.00 kg) |
| Length | 15.35 inches (389.89 mm) |
| Canister Diameter | 12.05 inches (306.00 mm) |
| Overall Dimensions (W x H) | 13.17 x 13.17 inches (334.60 x 334.60 mm) |
| Exhaust Emission Norm | EPA07 Compliant |
Key Features & Specifications for Cummins Replacement
- Proudly Built in the USA: Designed, engineered, and manufactured in America.
- No Core Charge: Brand-new aftermarket replacement element; eliminates core return freight costs and paperwork delays.
- Exact-Fit™ Design: Engineered with OEM-matching physical sizing, pre-machined sensor bosses, and rigid factory-spec hanger brackets for direct exhaust installation with zero modifications required.
- Substrate Performance Matrix: High-efficiency precious metal core substrate ensures precise regeneration intervals and dependable commercial engine emission control.
- Industry-Leading Warranty: Backed by an extensive unlimited mileage warranty on all Skyline aftermarket solutions.
- EPA Compliant: Meets federal emissions standards for legal installation.
- Free Shipping: Free ground shipping within the continental United States. Orders placed before 2:00 PM Eastern ship out the same business day.
Heavy-Duty Vehicle Fitment Guide
Direct alternative replacement solution for heavy-duty over-the-road commercial equipment. Optimized for:
- Engine Platforms: Cummins ISC and Paccar PX8 variants.
- Chassis Fitments & Applications: Accommodates standard commercial trucks, regional delivery units, and heavy freight haulers:
- Cummins / Paccar Applications: Heavy-duty vocational models, regional transport frameworks, municipal utility fleets, and distribution trucks matching original factory line parts indexed under core OEM numbers 5287491 or 4965352.
Signs Your Cummins DOC Needs Replacement
- Inability to trigger or finish active stationary exhaust system regenerations due to poor face temperatures tracking metrics across codes 5287491 / 4965352 / A035H299
- Raw fuel oil weeping from exhaust line down-pipes or extreme engine soot crusting across the intake catalyst face matrix
- Active dashboard diagnostic trouble codes (DTCs) flashing engine alerts for low catalyst conversion capabilities or thermal lag responses
- 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.
Looking for a reliable replacement filter fast?
Our warehouse stocks premium heavy-duty filtration components ready for immediate shipment. Contact our team today for bulk commercial fleet pricing and cross-reference validation.
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 and heavy-duty clamps required for 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.
Disclaimer: Product images 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.
