Nitrogen oxides (NOx) are among the most challenging emissions produced by diesel combustion — and minimizing them is critical for both environmental compliance and engine efficiency. The Cummins B6.7 / L9 SCR Filter (2018–2024, OEM 5418485) plays a central role in this process by working with DEF (Diesel Exhaust Fluid) in the Selective Catalytic Reduction (SCR) system to turn harmful NOx into harmless nitrogen and water. This isn’t just about meeting emissions standards — it’s about helping your engine stay healthy and efficient throughout real-world driving.
Here’s how this SCR filter keeps your diesel operating at its best:
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Targets Harmful NOx Emissions – The SCR filter enhances the chemical conversion of nitrogen oxides into benign byproducts, dramatically reducing the amount of NOx released into the air.
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Works Seamlessly With DEF – By providing the right surface and conditions for DEF and exhaust to interact, this filter helps the SCR system operate with precision.
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Supports Engine Durability – Proper SCR function eases the load on the engine and exhaust components, reducing heat-related stress and helping internal parts last longer.
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OEM-Level Quality and Fit – Built as OEM 5418485, this SCR filter matches factory specifications for fit and performance, giving you confidence that it integrates smoothly into your emissions system.
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Helps Avoid Fault Codes and Derates – A worn or ineffective SCR filter can trigger warning lights or protective power reductions; replacing it with the correct OEM part helps prevent those interruptions.
Without effective SCR filtration, NOx can go unrestrained, leading to poorer emissions performance and possible operational disruptions. The Cummins B6.7 / L9 SCR Filter (OEM 5418485) delivers the reliable NOx conversion your system demands, helping your truck or equipment run cleaner, smarter, and in line with modern emissions requirements. For owners who want a high-quality replacement that supports both performance and compliance, Tamerx offers a dependable, OEM-standard solution.



































