Cummins ISB 6.7L SCR Filter 2011-2017: OEM 4354222

SCR Emissions Support for Cummins ISB 6.7L Engines (2011–2017)

What is it?
The Cummins ISB 6.7L SCR Filter, identified by OEM 4354222, is an aftertreatment component designed for engines produced between 2011 and 2017. This filter is part of the Selective Catalytic Reduction (SCR) system, where Diesel Exhaust Fluid (DEF) is introduced into the exhaust stream. As DEF reacts with heat, it produces ammonia, which interacts within the catalyst to convert nitrogen oxides (NOx) into nitrogen and water vapor before being released.

Why choose this SCR Filter?
The SCR stage is responsible for reducing NOx emissions after combustion has already taken place. The OEM 4354222 filter is designed specifically for Cummins ISB 6.7L platforms, helping maintain proper exhaust flow and chemical reaction conditions within the system.

Over time, exposure to heat and exhaust contaminants can affect catalyst efficiency. When this happens, the system may struggle to process NOx effectively, which can lead to warning indicators or reduced emissions performance. Replacing the SCR filter helps restore proper DEF interaction, airflow balance, and system response.

Key Benefits
✅ OEM-matched SCR filter for Cummins ISB 6.7L engines
✅ Supports NOx reduction through DEF and catalyst interaction
✅ Helps maintain proper exhaust flow within the aftertreatment system
✅ Works with sensors and dosing components for system coordination
✅ Direct-fit design for straightforward installation

Applications
This SCR filter is used on diesel engines equipped with the Cummins ISB 6.7L platform manufactured from 2011 through 2017. These engines are commonly found in medium-duty trucks, commercial fleets, and vocational vehicles that rely on SCR-based systems for emissions compliance.

Installation Notes
Allow the exhaust system to cool completely before servicing. Remove the existing SCR filter and inspect surrounding components such as DEF injectors, sensors, and mounting hardware for buildup or wear. Install the replacement unit using proper seals and fasteners to ensure correct alignment. After installation, clear any stored fault codes and verify proper system operation using diagnostic tools.

Final Thoughts
Effective NOx reduction depends on proper SCR system function. The Cummins ISB 6.7L SCR Filter (OEM 4354222) helps maintain the chemical conversion process within the exhaust system, supporting consistent emissions control and stable engine operation.