Effective Emissions Filtration for Cummins B6.7 & L9 Engines (2018–2024)
What is it?
The Cummins B6.7, L9 DOC Filter OEM 4394820 is a key emissions control component installed within the Diesel Oxidation Catalyst (DOC) of your engine’s aftertreatment system. Its role is to oxidize harmful exhaust pollutants—such as hydrocarbons and carbon monoxide—into less harmful compounds, supporting cleaner exhaust output and efficient engine performance.
Why choose OEM 4394820?
This DOC filter is specifically engineered for Cummins B6.7 and L9 engines manufactured between 2018 and 2024. Its accurate fit and OEM-grade construction ensure seamless integration with your vehicle’s existing emissions system, helping maintain compliance, reduce system faults, and deliver dependable operation over time.
Key Benefits
✅ Engineered for 2018–2024 Cummins B6.7 & L9 engines
✅ Helps reduce hydrocarbons and carbon monoxide in exhaust
✅ Supports smoother and more efficient aftertreatment function
✅ Built to withstand high-temperature exhaust conditions
✅ Direct-fit replacement for easy installation
Applications
This DOC filter is ideal for Cummins-powered trucks and equipment built from 2018 through 2024. Typical applications include commercial trucks, vocational vehicles, delivery fleets, and other diesel-powered machinery requiring reliable emissions control for daily use.
Installation Notes
Ensure the exhaust and aftertreatment system are completely cooled before beginning installation. Inspect nearby sensors, gaskets, and connectors for wear or damage. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing and performance. After installation, verify that the emissions system is functioning correctly.
Final Thoughts
When your Cummins B6.7 or L9 engine shows emissions-related alerts or reduced aftertreatment performance, the OEM 4394820 DOC filter delivers a reliable, OE-quality replacement. Designed for precise fit and consistent emissions control, it helps keep your engine compliant and running efficiently. Tamerx has this DOC filter available and ready to ship.