Product Overview
International Navistar 2597007C91 2595715C91 5011121R91 DOC
Interchange References: International/Navistar 2597007C91, 2595715C91, 5011121R91, Skyline MC0505, FSS Emission Products MC0505-FSS, Roadwarrior C0102-ID, DuraFit C20-0021
Replace a worn or damaged International/Navistar 2597007C91, 2595715C91, or 5011121R91 Diesel Oxidation Catalyst DOC with this brand-new Skyline aftermarket DOC filter. This direct-fit replacement is intended for select International/Navistar MaxxForce 7 diesel engine applications using compatible EPA07 exhaust aftertreatment systems. This DOC has no core charge, includes a 3-year unlimited mileage warranty, is EPA compliant, and ships free within the continental United States.
International Navistar DOC Cross References
International/Navistar 2597007C91, 2595715C91, and 5011121R91 DOC filters cross-reference with Skyline MC0505 and the additional aftermarket replacement numbers listed below.
| Manufacturer | Cross Reference Part Numbers |
|---|---|
| International/Navistar OEM | 2597007C91, 2595715C91, 5011121R91 |
| Skyline | MC0505 |
| FSS Emission Products | MC0505-FSS |
| Roadwarrior | C0102-ID |
| DuraFit | C20-0021 |
International MaxxForce 7 DOC Engine Compatibility & Fitment Guide
This Skyline DOC filter is intended for select International/Navistar commercial diesel applications equipped with compatible MaxxForce 7 EPA07 exhaust aftertreatment systems. Exact compatibility varies by engine calibration, emissions family, model year, chassis configuration, exhaust layout, and the original stamped DOC part number.
- Engine Platform: Select International/Navistar MaxxForce 7 diesel engine applications
- Approximate Model Years: Select 2007–2009 applications
- Approximate Emissions Era: EPA07 exhaust aftertreatment applications
- Common Applications: Select medium-duty truck, school bus, delivery, vocational, municipal, and commercial fleet configurations
- Compatible OEM Numbers: 2597007C91, 2595715C91, and 5011121R91
Choose Your Kit Configuration
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) 2594129C1 installation gasket, and one (1) 2594128C1 heavy-duty clamp
- DOC Only: Includes one (1) DOC only. The gasket and clamp are not included
DOC Technical Specifications
| Measurement Parameter | Specification Value |
|---|---|
| Product Type | Diesel Oxidation Catalyst DOC inlet module |
| Common Search Terms | DOC, DOC Filter, Diesel Oxidation Catalyst |
| Primary OEM Part Numbers | 2597007C91, 2595715C91, 5011121R91 |
| Manufacturer Part Number | Skyline MC0505 |
| Engine Compatibility | Select International/Navistar MaxxForce 7 applications |
| Housing Material | Stainless steel |
| Core Condition | Brand-new aftermarket unit |
| Core Charge | No core charge |
| Warranty | 3-year unlimited mileage warranty |
| Exhaust Emission Norm | EPA07 compliant |
Key Features
- Direct-fit replacement for the listed International/Navistar OEM applications
- Brand-new Skyline aftermarket Diesel Oxidation Catalyst DOC
- No core charge or used catalyst return required
- Stainless steel housing construction
- EPA compliant for applicable federal emissions applications outside California
- Available Full Kit with one 2594129C1 gasket and one 2594128C1 clamp
- Ships free within the continental United States
- Backed by a 3-year unlimited mileage warranty
Signs Your DOC Needs Replacement
- Difficulty reaching or maintaining exhaust temperatures needed for DPF regeneration
- Frequent, incomplete, or unsuccessful regeneration cycles
- Diagnostic trouble codes related to DOC catalyst efficiency or exhaust temperature response
- Excessive soot loading in the downstream DPF
- Fuel, oil, or other contamination visible at the catalyst inlet
- Increased exhaust backpressure or reduced engine performance
- Cracking, melting, corrosion, or other physical damage to the catalyst substrate or housing
Multi-Warehouse Dispatch
Orders ship from regional fulfillment hubs to help provide fast delivery to your repair shop or location.
*Note: Always verify exact compatibility using your vehicle's VIN number or original stamped OEM part number on the unit before placing an order.
Disclaimer: Product images are for reference only. Each selected option includes one (1) physical DOC unit. The Full Kit option includes one DOC with the listed gasket and clamp. The DOC Only option includes one DOC only, with no gasket or clamp included.
