Product Overview
Cummins 5418478 4395106 4394601 DOC Diesel Oxidation Catalyst
Interchange References: Cummins 5418478, 5418478NX, 5418478RX, 4395106, 4395106NX, 4395106RX, 4394601, 4394601NX, 4394601RX, 2116695X, 2468125XS, Skyline BJ0303, FSS Emission Products BJ0303-FSS, Roadwarrior C0375-ID, Global Emission Systems GESi-563, Dinex 58327
Replace a worn or damaged Cummins 5418478, 4395106, or 4394601 DOC Diesel Oxidation Catalyst with this brand-new Skyline aftermarket DOC. This catalyst also cross-references Cummins service numbers 5418478NX, 5418478RX, 4395106NX, 4395106RX, 4394601NX, 4394601RX, 2116695X, and 2468125XS. It is intended for select Cummins B6.7 and Cummins L9 diesel engine applications equipped with compatible exhaust aftertreatment systems. The Full Kit includes one 2871772 installation gasket, one 2866636 installation gasket, one 5417471 heavy-duty clamp, and one 2880482 heavy-duty clamp. This DOC has no core charge, includes a 3-year unlimited mileage warranty, is EPA compliant, and ships free within the continental United States.
Cummins DOC Cross References
Cummins 5418478, 4395106, and 4394601 DOC catalysts cross-reference with Skyline BJ0303 and the additional OEM, service, and aftermarket replacement numbers listed below.
| Manufacturer | Cross Reference Part Numbers |
|---|---|
| Cummins OEM | 5418478, 5418478NX, 5418478RX, 4395106, 4395106NX, 4395106RX, 4394601, 4394601NX, 4394601RX, 2116695X, 2468125XS |
| Skyline | BJ0303 |
| FSS Emission Products | BJ0303-FSS |
| Roadwarrior | C0375-ID |
| Global Emission Systems | GESi-563 |
| Dinex | 58327 |
Cummins B6.7 and L9 DOC Engine Compatibility
This Skyline DOC is intended for select Cummins B6.7 and Cummins L9 commercial diesel engine applications equipped with compatible exhaust aftertreatment systems. Exact compatibility varies by engine configuration, emissions family, model year, chassis, exhaust layout, aftertreatment assembly, and the original stamped DOC part number.
- Engine Platforms: Select Cummins B6.7 and Cummins L9 applications
- Approximate Model Years: Select 2017–2025 applications
- Emissions Compliance: EPA compliant for applicable federal emissions applications outside California
- Full Kit Gaskets: One 2871772 gasket and one 2866636 gasket
- Full Kit Clamps: One 5417471 clamp and one 2880482 clamp
Choose the Setup That Fits Your Shop’s Needs
Select the configuration from the product options that best fits your installation needs.
- Full Kit (Best Value): Includes one (1) brand-new DOC unit, one (1) 2871772 installation gasket, one (1) 2866636 installation gasket, one (1) 5417471 heavy-duty clamp, and one (1) 2880482 heavy-duty clamp
- DOC Only: Includes one (1) Diesel Oxidation Catalyst only. Installation gaskets and clamps are not included
DOC Technical Specifications
| Measurement Parameter | Specification Value |
|---|---|
| Product Type | Diesel Oxidation Catalyst |
| Engine Compatibility | Select Cummins B6.7 and Cummins L9 applications |
| Length / Width | 12.59 in (320.00 mm) |
| Height | 7.55 in (192.00 mm) |
| Weight | 18.32 lb (8.31 kg) |
| Housing Material | Stainless steel |
| Included Installation Hardware | Full Kit includes two installation gaskets and two heavy-duty clamps |
| Core Condition | Brand-new aftermarket unit |
| Core Charge | No core charge |
| Warranty | 3-year unlimited mileage warranty |
| Emissions Compliance | EPA compliant |
Key Features
- Brand-new Skyline aftermarket DOC Diesel Oxidation Catalyst
- Full Kit includes two installation gaskets and two heavy-duty clamps
- DOC Only configuration available without installation hardware
- No core charge or used catalyst return required
- Stainless steel housing construction
- EPA compliant for applicable federal emissions applications outside California
- Ships free within the continental United States
- Backed by a 3-year unlimited mileage warranty
Signs Your DOC May Need Inspection or Replacement
- Frequent, incomplete, or unsuccessful DPF regeneration cycles
- DOC efficiency or catalyst-conversion diagnostic trouble codes
- Slow exhaust-temperature increase during an active regeneration
- Excessive soot, oil, fuel, or ash contamination on the catalyst face
- High exhaust backpressure or abnormal pressure readings
- Reduced engine performance under load
- Cracking, melting, corrosion, or other physical catalyst damage
These symptoms may have multiple causes. Diagnose the complete engine, fuel, turbocharger, sensor, and exhaust aftertreatment systems before replacing the DOC.
*Note: Always verify exact compatibility using the vehicle VIN, emissions-family label, aftertreatment assembly information, and the original stamped OEM part number on the DOC before ordering.
Disclaimer: Product images are for reference only. Each selected configuration includes one (1) physical DOC unit. The Full Kit option includes one DOC, one 2871772 installation gasket, one 2866636 installation gasket, one 5417471 heavy-duty clamp, and one 2880482 heavy-duty clamp. The DOC Only option includes one DOC only, with no installation gaskets or clamps included.
