Product Overview
International Navistar 2603456C91 DOC Diesel Oxidation Catalyst
Interchange References: International/Navistar 2603456C91, Skyline 1N0508, FSS Emission Products 1N0508-FSS, DuraFit C20-0073, Roadwarrior C0157-ID
Replace a worn or damaged International/Navistar 2603456C91 DOC Diesel Oxidation Catalyst with this brand-new Skyline aftermarket DOC. This Diesel Oxidation Catalyst also cross-references Skyline 1N0508, FSS Emission Products 1N0508-FSS, DuraFit C20-0073, and Roadwarrior C0157-ID. It is intended for select Navistar MaxxForce 11 and MaxxForce 13 diesel engine applications equipped with compatible EPA07 exhaust aftertreatment systems. The Full Kit includes one 2601233C1 aftermarket exhaust gasket, one 2866337 aftermarket exhaust gasket, one 2596663C1 heavy-duty clamp, and one 2880483 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.
Cross References
International/Navistar 2603456C91 DOC catalysts cross-reference with Skyline 1N0508 and the additional aftermarket replacement numbers listed below.
| Cross Reference Brand | Cross Reference Part Numbers |
|---|---|
| International/Navistar OEM | 2603456C91 |
| Skyline | 1N0508 |
| FSS Emission Products | 1N0508-FSS |
| DuraFit | C20-0073 |
| Roadwarrior | C0157-ID |
Navistar MaxxForce 11 and MaxxForce 13 Engine Compatibility
This Skyline DOC is intended for select Navistar MaxxForce 11 and MaxxForce 13 diesel engine applications equipped with compatible EPA07 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 Navistar MaxxForce 11 and MaxxForce 13 applications
- Approximate Model Years: Select 2007–2009 applications
- Emissions Standard: Select EPA07 exhaust aftertreatment applications
- Full Kit Gaskets: One 2601233C1 gasket and one 2866337 gasket
- Full Kit Clamps: One 2596663C1 clamp and one 2880483 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: Includes one (1) brand-new DOC, one (1) 2601233C1 aftermarket exhaust gasket, one (1) 2866337 aftermarket exhaust gasket, one (1) 2596663C1 heavy-duty clamp, and one (1) 2880483 heavy-duty clamp.
- DOC Only: Includes one (1) Diesel Oxidation Catalyst only. Installation gaskets and clamps are not included.
DOC Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Diesel Oxidation Catalyst |
| Cross References | International/Navistar 2603456C91; Skyline 1N0508; FSS Emission Products 1N0508-FSS; DuraFit C20-0073; Roadwarrior C0157-ID |
| Engine Compatibility | Select Navistar MaxxForce 11 and MaxxForce 13 applications |
| Housing Material | Stainless steel |
| Full Kit Hardware | One 2601233C1 gasket, one 2866337 gasket, one 2596663C1 clamp, and one 2880483 clamp |
| Product Condition | Brand-new aftermarket unit |
| Core Charge | No core charge |
| Warranty | 3-year unlimited mileage warranty |
| Emissions Standard | EPA07 compliant |
Key Features
- Brand-new Skyline aftermarket DOC Diesel Oxidation Catalyst
- Full Kit and DOC Only configurations available
- No core charge or used catalyst return required
- Stainless steel housing construction
- EPA07 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, EGR, DPF, 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. The Full Kit option includes one DOC, one 2601233C1 aftermarket exhaust gasket, one 2866337 aftermarket exhaust gasket, one 2596663C1 heavy-duty clamp, and one 2880483 heavy-duty clamp. The DOC Only option includes one DOC only, with no installation gaskets or clamps included.
