Quality Emissions Filtration for Cummins B6.7 & L9 (2018–2024)
What is it?
The Cummins B6.7, L9 DOC Filter OEM 4394820 is a vital emissions control component located inside the Diesel Oxidation Catalyst (DOC) of your engine’s aftertreatment system. It works by oxidizing harmful exhaust pollutants—such as hydrocarbons and carbon monoxide—into less harmful compounds, promoting cleaner emissions and helping your engine operate more efficiently.
Why choose OEM 4394820?
This DOC filter is engineered specifically for Cummins B6.7 and L9 engines manufactured from 2018 through 2024. Its precise OEM design ensures proper fitment and seamless integration with your vehicle’s existing aftertreatment hardware. That means fewer emissions faults, better durability, and consistent performance you can count on.
Key Benefits
✅ Engineered for 2018–2024 Cummins B6.7 & L9 engines
✅ Helps lower hydrocarbons and carbon monoxide in exhaust
✅ Aids smoother operation of the aftertreatment system
✅ Built to endure high-temperature exhaust environments
✅ Direct-fit replacement for easier installation
Applications
This DOC filter is suitable for Cummins-powered commercial trucks, vocational vehicles, delivery fleets, and other diesel-powered machinery built from 2018 to 2024 that depend on effective and compliant emissions control systems.
Installation Notes
Before installation, make sure the exhaust and aftertreatment system are fully cool. Inspect nearby sensors, gaskets, and connections for wear or contamination. Follow Cummins-recommended procedures and torque specifications for proper sealing and installation. After installation, verify that the emissions system is working correctly.
Final Thoughts
If your Cummins B6.7 or L9 engine is showing emissions-related alerts or reduced aftertreatment performance, the OEM 4394820 DOC filter offers a dependable, OE-grade replacement. Designed for precise fit and consistent emissions control, it helps keep your engine compliant and operating efficiently. Tamerx has this DOC filter in stock and ready to ship.