Cummins QSB, 6.7L, 4.5L SCR Filter 2012-2020: OEM 4387661

Protect Aftertreatment Flow on Cummins QSB & 4.5L (2012–2020)

What is it?
The Cummins QSB, 6.7L, 4.5L SCR Filter OEM 4387661 is a vital emissions aftertreatment component that captures soot, ash, and other particulate contaminants before they enter the Selective Catalytic Reduction (SCR) system. By trapping these particles early in the exhaust stream, this SCR filter helps maintain cleaner airflow and supports more efficient NOx reduction — a key factor in keeping your engine emissions compliant.

Why choose OEM 4387661?
Engineered to meet Cummins’ original specifications for QSB, 6.7L, and 4.5L engines produced between 2012 and 2020, this OEM SCR filter provides accurate fitment and seamless integration with your vehicle’s factory aftertreatment system. Choosing a genuine OEM-matched filter like the 4387661 helps maintain stable regeneration cycles, reduce the risk of clogging, and protect downstream SCR components from premature wear — boosting reliability over time.

Key Benefits
✅ Designed for Cummins QSB, 6.7L & 4.5L engines (2012–2020)
✅ Helps trap soot and limit particulate contamination
✅ Supports consistent SCR regeneration and emissions control
✅ Built to endure high exhaust temperatures
✅ Direct-fit design for simpler replacement

Applications
This SCR filter is ideal for light- and medium-duty commercial trucks, service vehicles, and industrial equipment powered by Cummins QSB, 6.7L, or 4.5L engines from 2012–2020. It’s commonly used in delivery fleets, vocational rigs, and other diesel-powered applications where dependable emissions filtration is essential.

Installation Notes
Before installation, make sure the exhaust system has fully cooled. Inspect related sensors, clamps, gaskets, and mounting hardware for wear or damage, and replace any worn components as needed. After installing the SCR filter, verify all connections are secure and follow manufacturer-recommended system checks to confirm proper operation.

Final Thoughts
When it’s time to replace a worn or clogged SCR filter on your Cummins QSB or 6.7L/4.5L engine, the OEM 4387661 offers a dependable, factory-matched solution. Designed for accurate fitment and consistent performance, it helps keep your emissions system operating efficiently and your vehicle ready for the road. Tamerx has this SCR filter in stock and ready to ship.