Cummins QSB 6.7L SCR Outlet Catalyst Module 2011-2020: OEM 4387485

Keep Emissions Systems Operating Efficiently with an SCR Outlet Catalyst Module for Cummins QSB 6.7L Engines

What is it?
The Cummins QSB 6.7L SCR outlet catalyst module, identified by OEM 4387485, is an emissions aftertreatment component designed for Cummins QSB 6.7L diesel engines produced between 2011 and 2020. Located at the outlet section of the Selective Catalytic Reduction (SCR) system, this module helps complete the exhaust treatment process by reducing nitrogen oxide (NOx) emissions before exhaust gases are released from the engine.

Why choose this SCR Outlet Catalyst Module?
Efficient aftertreatment systems rely on properly functioning catalyst modules to maintain emissions compliance and dependable exhaust performance. This SCR outlet catalyst module is manufactured to match Cummins QSB 6.7L specifications, ensuring compatibility with factory-installed DEF dosing equipment, sensors, and exhaust system components. Over time, catalyst materials may become less effective due to heat exposure, soot accumulation, and contamination, potentially affecting overall aftertreatment efficiency. Replacing the module with the correct OEM-matched component helps maintain consistent NOx reduction and stable emissions system operation.

Key Benefits
✅ Designed for Cummins QSB 6.7L engines (2011–2020)
✅ Supports effective NOx reduction through the SCR system
✅ Helps maintain consistent aftertreatment and exhaust performance
✅ Direct-fit replacement for accurate installation
✅ Built to withstand demanding high-temperature diesel environments

Applications
This SCR outlet catalyst module is used on construction equipment, agricultural machinery, generators, industrial equipment, and other commercial applications equipped with Cummins QSB 6.7L engines from 2011 through 2020. These applications rely on dependable emissions control and reliable aftertreatment performance to support continuous operation.

Installation Notes
Before installation, allow the exhaust and aftertreatment system to cool completely. Remove the existing SCR outlet catalyst module and inspect surrounding DEF components, sensors, clamps, and exhaust connections for contamination or wear. Install the replacement module using the appropriate mounting hardware and sealing components to ensure proper alignment and leak-free operation. After installation, verify correct aftertreatment functionality and clear any stored diagnostic fault codes using approved service equipment.

Final Thoughts
If your Cummins QSB 6.7L-powered equipment is experiencing emissions warnings, reduced SCR efficiency, or inconsistent aftertreatment performance, replacing the SCR outlet catalyst module with the correct OEM component can help maintain reliable exhaust treatment. The Cummins QSB 6.7L SCR outlet catalyst module (OEM 4387485) plays a vital role in supporting dependable emissions control, efficient NOx reduction, and long-term diesel engine performance.