Cummins B6.7 DOC Filter 2018-2021: OEM 4394820

Trusted Emissions Filtration for Cummins B6.7 (2018–2021)

What is it?
The Cummins B6.7 DOC Filter OEM 4394820 is a vital part of the aftertreatment system on your engine. Installed in the Diesel Oxidation Catalyst (DOC), this filter helps convert harmful exhaust pollutants—like hydrocarbons and carbon monoxide—into less harmful compounds, supporting cleaner emissions and smoother engine operation.

Why choose OEM 4394820?
Designed specifically for Cummins B6.7 engines from 2018 through 2021, this DOC filter offers precision fitment and dependable performance that aligns with the original equipment’s specifications. Choosing the OEM component helps maintain proper emissions control, reduce system faults, and ensure long-term reliability.

Key Benefits
✅ Built for 2018–2021 Cummins B6.7 engines
✅ Helps lower hydrocarbons and carbon monoxide in exhaust
✅ Supports improved aftertreatment performance
✅ Constructed to withstand high-temperature exhaust conditions
✅ Direct-fit design for straightforward installation

Applications
This DOC filter is ideal for Cummins B6.7-powered trucks and equipment produced between 2018 and 2021. Typical applications include light- and medium-duty commercial vehicles, delivery fleets, vocational equipment, and other diesel-powered machines that depend on effective emissions control.

Installation Notes
Make sure the exhaust and aftertreatment system are fully cooled before beginning installation. Inspect adjacent sensors, gaskets, and connectors for wear or damage. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing. After installation, verify the emissions system functions as expected.

Final Thoughts
If your Cummins B6.7 engine is experiencing emissions-related alerts or diminished aftertreatment performance, the OEM 4394820 DOC filter provides a reliable, OE-grade replacement solution. 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.