Cummins B6.7 DOC Filter 2022-2024: OEM 5418120

Engine-Matched Exhaust Treatment for Cummins B6.7 Engines (2022–2024)

What is it?
The Diesel Oxidation Catalyst (DOC) filter for the Cummins B6.7 engine, covering model years 2022–2024 and referenced by OEM part number 5418120, is a critical emissions-control component. Positioned early in the aftertreatment system, it converts hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream into less harmful byproducts before gases continue through the remaining emissions components, helping the system function as intended.

Why choose the Cummins B6.7 DOC Filter (OEM 5418120)?
This DOC filter is designed specifically for the Cummins B6.7 platform, aligning with factory specifications for fit and function. When a DOC filter becomes restricted or deteriorated, it can interfere with exhaust flow and trigger aftertreatment warnings. Selecting the correct OEM-matched DOC filter helps maintain proper exhaust conditioning and supports stable operation of the entire emissions system.

Key Benefits
✅ Engine-specific design for Cummins B6.7 applications
✅ Supports proper exhaust gas conditioning at the start of the aftertreatment system
✅ Helps maintain consistent exhaust flow with minimal restriction
✅ Direct-fit configuration for straightforward replacement
✅ Built to withstand high exhaust temperatures and continuous duty cycles

Applications
This DOC filter is intended for medium-duty trucks and commercial vehicles equipped with Cummins B6.7 engines from the 2022–2024 model years. Common applications include delivery trucks, vocational equipment, and fleet vehicles that rely on dependable emissions control to meet regulatory requirements and maintain reliable day-to-day operation.

Installation Notes
Allow the exhaust system to cool completely before beginning installation. Remove the existing DOC filter and inspect surrounding exhaust components, sensors, and mounting hardware for signs of damage or buildup. Install the replacement DOC using new gaskets, clamps, and seals to ensure proper sealing. Once installed, clear any stored fault codes and confirm correct system operation using appropriate diagnostic tools.

Final Thoughts
If your Cummins B6.7-equipped vehicle is experiencing emissions-related alerts or signs of exhaust restriction, replacing the DOC filter with the correct OEM-specified unit can help reestablish proper exhaust treatment. The Cummins B6.7 DOC Filter (OEM 5418120) plays an essential role in maintaining emissions system balance and supporting dependable vehicle operation.