Cummins ISB6.7, ISL SCR Filter 2013-2017: OEM 4354134RX

Efficient NOx Conversion for Cummins ISB 6.7L & ISL Engines (2013–2017)

What is it?
The Cummins ISB 6.7L / ISL SCR Filter (OEM 4354134RX) is an emissions aftertreatment component designed for Cummins diesel engines manufactured between 2013 and 2017. This unit operates 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 stream.

Why choose this SCR Filter?
Built to Cummins OEM specifications, this SCR filter ensures proper compatibility with factory aftertreatment systems. It is commonly part of an integrated emissions assembly designed to reduce pollutants such as NOx, particulate matter, and hydrocarbons from diesel exhaust. 

Over time, SCR catalysts can become less effective due to contamination or internal wear, which may lead to emissions-related fault codes or reduced system efficiency. Installing the correct OEM-specified replacement helps maintain proper exhaust treatment and consistent system performance.

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 exhaust connections for buildup or wear. 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 4354134RX) plays a critical role in maintaining emissions compliance and dependable engine performance.