Cummins ISB 6.7L DOC Filter 2018-2022: OEM 5418479

Emission Assurance for Today’s Duty Cycle: Cummins ISB 6.7L DOC Filter (2018–2022, OEM 5418479)

What is it?
The Cummins ISB 6.7L DOC Filter (2018–2022, OEM 5418479) is a Diesel Oxidation Catalyst designed for Cummins ISB 6.7L engines built between 2018 and 2022. Its primary role is to oxidize hydrocarbons (HC) and carbon monoxide (CO) within the exhaust system, converting them into less harmful compounds before gases move downstream to other aftertreatment components like the DPF and SCR.

Why Choose the Cummins ISB 6.7L DOC Filter (OEM 5418479)?
This DOC filter is built to Cummins’ OEM standards, ensuring the correct fit, sensor placement, and exhaust flow characteristics for your ISB 6.7L engine. Using a filter designed to match factory specifications guarantees smooth installation, consistent exhaust flow, and long-term emissions reliability. It’s a dependable choice for maintaining compliance and protecting your engine’s aftertreatment system.

Key Benefits
✅ OEM-Accurate Fitment: Designed to align perfectly with factory exhaust mounts, clamps, and sensors.
✅ Rugged Construction: Built to endure high temperatures, vibration, and extended heavy-duty use.
✅ Efficient Emission Conversion: Promotes oxidation of HC and CO, ensuring cleaner exhaust output.
✅ Reliable System Operation: Helps minimize fault codes and irregular regeneration cycles.
✅ Extended Component Life: Protects downstream systems—such as DPFs, sensors, and SCR units—from excess soot and contamination.

Applications
The Cummins ISB 6.7L DOC Filter (2018–2022, OEM 5418479) is designed for use in medium- and heavy-duty trucks, buses, and commercial vehicles powered by Cummins ISB 6.7L engines. It’s ideal for fleets and owner-operators seeking consistent emissions performance and long-term reliability in regional and vocational operations.

Installation Notes
This DOC filter is designed for direct replacement, but professional installation is highly recommended. Before installation, confirm the part number matches your engine configuration. Remove the existing unit carefully, inspecting clamps, gaskets, and sensor ports for wear. Clean all mating surfaces thoroughly before fitting the new DOC. Replace all seals and hardware as needed, and torque bolts to the manufacturer’s specifications. Reconnect sensors securely, clear any fault codes, and run the engine to check for proper exhaust flow, pressure, and temperature readings. A clean, well-seated installation helps ensure optimal DOC efficiency and system performance.

Final Thoughts
A reliable DOC filter is crucial for emissions compliance and smooth engine function. The Cummins ISB 6.7L DOC Filter (2018–2022, OEM 5418479) delivers OEM-level quality, precise fitment, and dependable oxidation performance—keeping your Cummins-powered vehicle efficient, compliant, and road-ready.