Cummins ISB6.7, ISL SCR Filter 2013-2017: OEM 4354071RX

Consistent NOx Reduction for Cummins ISB 6.7L & ISL Engines (2013–2017)

What is it?
The Cummins ISB 6.7L / ISL SCR Filter (OEM 4354071RX) is an emissions aftertreatment component designed for Cummins diesel engines manufactured between 2013 and 2017. This unit functions within the Selective Catalytic Reduction (SCR) system, where it works with Diesel Exhaust Fluid (DEF) to convert nitrogen oxides (NOx) into less harmful gases before they exit the exhaust.

Why choose this SCR Filter?
Built to Cummins OEM specifications, this SCR filter is engineered for proper compatibility with factory aftertreatment systems. It is often part of a larger aftertreatment assembly that helps reduce harmful pollutants and meet emissions standards.

Over time, SCR components can lose efficiency due to contamination or internal wear, which may result in emissions warnings, reduced system performance, or improper DEF dosing. Replacing the filter with the correct OEM-specified unit helps restore consistent NOx reduction and balanced exhaust flow.

Key Benefits
✅ Designed for Cummins ISB 6.7L & ISL engines (2013–2017)
✅ Supports NOx reduction through SCR operation
✅ Helps maintain proper DEF-based emissions treatment
✅ Direct replacement — no modifications required
✅ Built for high-temperature, heavy-duty diesel environments

Applications
This SCR filter is commonly used in medium- and heavy-duty commercial vehicles powered by Cummins ISB and ISL engines. Typical applications include delivery trucks, vocational vehicles, regional fleet units, and industrial equipment where emissions compliance and reliable operation are essential.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to fully cool. Remove the existing SCR filter and inspect surrounding components such as DEF injectors, sensors, and mounting hardware for buildup or damage. Install the replacement unit using proper clamps and seals to ensure a secure fit. After installation, clear any stored fault codes and verify proper SCR system operation using diagnostic tools.

Final Thoughts
If your Cummins-equipped vehicle is experiencing emissions alerts, inconsistent NOx readings, or reduced aftertreatment efficiency, replacing the SCR filter with the correct OEM component can help restore proper exhaust treatment. The Cummins ISB 6.7L / ISL SCR Filter (OEM 4354071RX) plays a vital role in maintaining emissions compliance and dependable engine performance.