Restore emissions performance with this premium Skyline aftermarket International / Navistar 2606987C91 DOC Inlet Module Replacement. Commonly referred to by fleet owners and maintenance crews as a replacement DOC filter, this brand-new Diesel Oxidation Catalyst (DOC) serves as a direct-fit alternative to high-traffic OEM part number 2606987C91. Engineered as an exact-fit replacement for heavy-duty 2010 to 2012 aftertreatment modules running compatible MaxxForce engine platforms, this high-efficiency oxidation catalyst requires no exhaust system modifications for installation, carries zero core charge, and ships free within the continental United States.

International / Navistar 2606987C91 DOC Inlet Module Cross Reference

How to Verify Your Unit: This direct-fit replacement diesel oxidation catalyst module replaces components stamped with housing numbers, casting codes, or tag profiles matching any of the interchangeable manufacturing references listed below:

Choose Your Kit Configuration

Select the configuration setup from the product choices above that best fits your shop's maintenance requirements:

• Full Kit (Best Value): Includes (1) Brand-New Oxidation Catalyst, (1) replacement installation gasket (2368086), (1) replacement outlet gasket (21371340), (1) rigid mounting clamp (2607045C1), and (1) assembly hardware clamp (5290118).
• DOC Only: Includes the replacement catalyst module core only. Service gaskets and mounting clamps are not included.

Key Features & Specifications for Part 2606987C91

• Built in the USA: Designed, engineered, and manufactured in America.
• No Core Charge: Brand-new aftermarket element; completely eliminates tracking core returns, return freight charges, and bank credit delays.
• Exact-Fit™ Technical Dimensions: Formed with OEM-matching physical layout sizing, pre-machined sensor bung placements, and rigid indexing alignment pins for drop-in installation with zero exhaust alterations required.
• Catalyst Substrate Matrix: High-performance flow-through washcoat substrate configuration allows correct exhaust gas temperature generation to properly support downstream DPF passive regeneration.
• Industry-Leading Warranty: Backed by a 3-year unlimited mileage warranty on all Skyline aftermarket solutions.
• EPA Compliant: Complies with federal emissions rules to fulfill required heavy-duty particulate matter reduction parameters.
• Free Shipping: Free ground shipping within the continental United States. Orders submitted before 2:00 PM Eastern ship out the same business day.

International / Navistar Vehicle Fitment Guide

Direct alternative solution for commercial heavy-duty trucks, regional delivery units, and vocational equipment configured with compatible emissions systems tracking model years approximately 2010 to 2012. Optimized for:

• Engine Platforms: Navistar MaxxForce DT, MaxxForce 9, and MaxxForce 10 inline diesel platforms.
• Chassis Fitments: This high-volume inlet module layout drops securely into frame attachments across major fleet configurations:
  • International Platforms: DuraStar 4300 / 4400 Series, WorkStar 7300 / 7400 vocational models, and regional cargo configurations tracking under factory code 3817962C91.

Compatible OEM Master Assembly Numbers: 3817962C91

Signs Your Diesel Oxidation Catalyst (DOC) Needs Replacement

• Inability to initiate or complete manual parked DPF regeneration cycles due to low internal exhaust face temperature generation across number 3817962C91
• Raw unburned fuel dripping from exhaust clamps or heavy oil soot contamination visible on the internal inlet module matrix
• Active dashboard diagnostic trouble codes (DTCs) signaling low catalyst efficiency levels or abnormal upstream sensor delta values
• Unexplained increase in downstream DPF filter plugging frequency due to catalyst washcoat breakdown

*Note: Always verify exact vehicle compatibility using your vehicle's VIN number, emissions family descriptor tag, or the original stamped part number on your catalyst unit casing before placing an order.

Disclaimer: Product images for reference only. Final replacement hardware items matching 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.