Diesel engines rely on advanced emissions systems to reduce harmful exhaust pollutants, and the International Navistar MaxxForce 13 DOC Filter (2011–2014, OEM 5010811R91) plays a central role in that system. The Diesel Oxidation Catalyst (DOC) filter helps convert carbon monoxide and unburned hydrocarbons into less harmful gases before they proceed through the rest of the emissions system. Using the correct OEM-grade DOC filter ensures your engine’s aftertreatment components work together efficiently, supporting cleaner operation and dependable performance.
This DOC filter contributes significantly to effective emissions control — here’s why it matters:
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Improves Exhaust Quality – Assists in transforming carbon monoxide and hydrocarbons into safer exhaust gases, helping reduce pollutants before they exit the tailpipe.
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Supports Downstream Emissions Components – By reducing the pollutant load early in the exhaust stream, the DOC filter helps downstream systems like Green Diesel Particulate Filters (DPF) or SCR catalysts work more efficiently.
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Helps Maintain Emissions Compliance – Installing the proper DOC filter helps ensure your engine continues to meet emissions standards without triggering warning lights or derate conditions.
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OEM-Grade Fit and Durability – As OEM 5010811R91, this filter matches original specifications for size, materials, and performance, delivering reliable, long-lasting operation.
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Prevents Exhaust System Issues – Replacing a worn or clogged DOC filter can help reduce backpressure, improve throttle response, and maintain smoother exhaust flow.
A failing or restricted DOC filter can compromise emissions performance, increase exhaust resistance, and even lead to system warnings or performance restrictions. The International Navistar MaxxForce 13 DOC Filter (OEM 5010811R91) provides the OEM-standard quality and emissions support your engine depends on — helping keep your diesel running cleaner and more efficiently. For customers seeking a reliable replacement part, Tamerx offers high-quality components designed to support long-lasting emissions performance and dependable engine health.












