Cummins B6.7 DOC Filter 2018-2021: OEM 4394769

Engine Aftertreatment Support for Cummins B6.7 (2018–2021)

What is it?
The Cummins B6.7 DOC Filter OEM 4394769 is a vital emissions control element located in the Diesel Oxidation Catalyst (DOC) portion of the engine’s aftertreatment system. It helps oxidize harmful exhaust byproducts like hydrocarbons and carbon monoxide into less harmful compounds before they proceed through the rest of the emissions hardware, promoting cleaner exhaust and smoother engine performance.

Why choose OEM 4394769?
Specifically engineered for Cummins B6.7 engines built between 2018 and 2021, this DOC filter delivers exact fitment and reliable integration with your factory aftertreatment system. OEM construction helps reduce the likelihood of emissions faults and performance issues while providing durability and dependable operation in daily use.

Key Benefits
✅ Designed for Cummins B6.7 engines (2018–2021)
✅ Helps lower hydrocarbons and carbon monoxide in exhaust
✅ Supports efficient aftertreatment system performance
✅ Built to tolerate high exhaust temperatures
✅ Direct-fit replacement for simplified installation

Applications
This DOC filter is ideal for Cummins B6.7-powered commercial trucks, delivery vehicles, vocational rigs, and other diesel machinery manufactured between 2018 and 2021 that require compliant emissions control systems for everyday performance.

Installation Notes
Make sure the exhaust and aftertreatment system are fully cooled before beginning installation. Inspect adjacent sensors, gaskets, and connections for wear or contamination. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing and function. After installation, verify that the emissions system is operating correctly.

Final Thoughts
If your Cummins B6.7 engine shows emissions-related warnings or reduced aftertreatment efficiency, the OEM 4394769 DOC filter offers a dependable OE-grade replacement solution. Designed for accurate fit and trusted emissions control, it helps keep your engine compliant and performing efficiently. Tamerx has this DOC filter in stock and ready to ship.