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 crucial component in the Diesel Oxidation Catalyst (DOC) section of your engine’s emissions system. It helps break down harmful exhaust elements, including hydrocarbons and carbon monoxide, into less harmful gases before they proceed through the rest of the aftertreatment system, contributing to cleaner exhaust and smoother engine performance.
Why choose OEM 4394820?
This DOC filter is designed specifically for use in Cummins B6.7 and L9 engines produced from 2018 through 2024. Its exact-fit engineering and OEM-grade construction help ensure proper integration with your existing emissions hardware, reducing the risk of faults, improving durability, and supporting consistent emissions control over time.
Key Benefits
✅ Built for 2018–2024 Cummins B6.7 & L9 engines
✅ Assists in reducing hydrocarbons and carbon monoxide emissions
✅ Helps promote efficient functioning of the aftertreatment system
✅ Designed to withstand high-temperature exhaust environments
✅ Direct-fit replacement for easier installation
Applications
This DOC filter is ideal for Cummins-powered commercial trucks, vocational vehicles, delivery fleets, and other diesel-powered machinery from 2018 through 2024 that require effective and compliant emissions control systems.
Installation Notes
Ensure the exhaust and aftertreatment system are fully cooled before installation. Check adjacent sensors, gaskets, and connections for wear or damage. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing. After installation, verify that the emissions system is functioning correctly.
Final Thoughts
If your Cummins B6.7 or L9 engine is showing emissions-related alerts or diminished aftertreatment performance, the OEM 4394820 DOC filter delivers a dependable OE-grade solution. With precise fitment and consistent emissions control, it helps keep your engine compliant and performing efficiently. Tamerx has this DOC filter in stock and ready to ship.