Product Overview
Aftermarket DOC Replacement for Cummins 5287191 / 4965243 / Q621301 DOC Filter
Interchangeable Component Configurations: 5287191 | 4965243 | Q621301 | 4330062
Restore emissions performance with this premium aftermarket Cummins 5287191 / 4965243 / Q621301 DOC Inlet Module Replacement Kit. This brand-new Diesel Oxidation Catalyst (DOC) serves as a direct-fit alternative to high-traffic OEM numbers 5287191, 5287191NX, 5287191RX, 4965243, 4965243NX, 4965243RX, Q621301, and A035G674. Engineered as an exact-fit replacement for heavy-duty EPA07 emissions modules running Cummins ISM and Cummins ISL 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 5287191
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 OEM | 5287191, 5287191NX, 5287191RX, 4965243, 4965243NX, 4965243RX, Q621301, A035G674 |
| Roadwarrior Alternative | C0028-ID |
| Dinex Emissions | 58015 |
| DuraFit Alternative | C20-0003 |
| FSS Emission Products | MN0402-FSS |
| Global Emission Systems | GESi-502 |
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, (2) 2871453 OEM-quality flange gaskets, and (2) 2871863 heavy-duty hardware alignment clamps.
- DOC Only: Includes the replacement oxidation module core only. Service gaskets and mounting clamps are not included.
TECHNICAL SPECIFICATIONS
| Material | Premium Stainless Steel |
| Weight | 27.78 lbs (12.61 kg) |
| Length | 6.94 inches (176.28 mm) |
| Core Diameter | 13.17 inches (334.60 mm) |
| Exhaust Emission Norm | EPA07 Compliant |
Key Features
- Manufactured with an exact-fit blueprint layout structure.
- EPA Compliant: Certified to meet or exceed federal regulations for heavy-duty over-the-road particulate matter safety parameters.
- No Core Charge: Brand-new unit; eliminates tracking core logistics, core return tracking expenses, and bank delays.
- Exact-Fit™ Design: Engineered as a genuine OE manufactured component alternative; mounts securely to exhaust lines with zero frame alterations required.
- Fast Free Shipping: Free ground delivery inside the continental United States. Orders verified prior to 2:00 PM Eastern ship out the same business day.
- Warranty Protection: Supported by an industry-leading 3-year unlimited mileage replacement warranty layout.
Engine Compatibility & Fitment Guide
Direct alternative solution for over-the-road vocational chassis configurations tracking under approximate model years 2007 to 2009. Optimized for:
- Engine Platforms: Cummins ISM (9.0L/10.8L) and Cummins ISL platforms running active fleet emissions architectures.
OEM Assembly Numbers: 4964921, 4965136, 4965137, 4965138, 4965139, 4965162, 4965163, 4965164, 4965166, 4965214, 4965391, 4969660, 4969681, 4969831, 4969847
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 alignment 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.
SIGNS YOUR DIESEL OXIDATION CATALYST (DOC) NEEDS REPLACEMENT
- Inability to initiate or complete manual parked DPF regenerations due to low face temperature generation across code sets 5287191 / 4965243 / Q621301
- Raw unburned fuel dripping from exhaust joints or visual soot fouling accumulated directly at the catalyst core intake face
- Active dashboard diagnostic trouble codes (DTCs) pointing to poor catalyst conversion efficiencies or sensor thermal response delays
- Unexplained increase in downstream DPF filter plugging frequency due to active catalyst washcoat breakdown
*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 components (filter, gaskets, clamps, sensor locations) depend on the selected configuration. Selecting the "Full Kit" option adds the explicitly listed installation components to your shipment. Price is for (1) DOC only.
