Cummins ISB 6.7L SCR Outlet Module 2011-2016: OEM 4354073

SCR Outlet Control Module for Cummins ISB 6.7L Engines (2011–2016)

What is it?
The Cummins ISB 6.7L SCR Outlet Module, identified by OEM 4354073, is an aftertreatment component designed for engines produced between 2011 and 2016. This module is positioned at the outlet side of the Selective Catalytic Reduction (SCR) system, where it plays a role in processing exhaust gases after DEF has been introduced.

As exhaust gases pass through the SCR stage, nitrogen oxides (NOx) are converted into nitrogen and water vapor through a chemical reaction with ammonia derived from DEF. The outlet module helps manage the final stage of this process by maintaining proper flow and supporting the overall emissions system structure.

Why choose this SCR Outlet Module?
SCR systems depend on proper flow and consistent catalyst conditions to reduce emissions effectively. The OEM 4354073 outlet module is designed for Cummins ISB 6.7L platforms, helping maintain balanced exhaust movement as gases exit the SCR stage.

Within the aftertreatment system, components work together to convert harmful pollutants into less harmful compounds. If the outlet section becomes restricted, damaged, or worn, it can affect the efficiency of the entire emissions process—potentially leading to increased backpressure, warning alerts, or inconsistent system performance.

Replacing the module helps restore proper exhaust flow and ensures the SCR system continues to operate as intended.

Key Benefits
✅ OEM-matched SCR outlet module for Cummins ISB 6.7L engines
✅ Supports final-stage exhaust flow after SCR processing
✅ Helps maintain balanced pressure within the aftertreatment system
✅ Works alongside DEF dosing and catalyst components
✅ Direct-fit design for proper alignment and installation

Applications
This SCR outlet module is used on diesel engines equipped with the Cummins ISB 6.7L platform manufactured from 2011 through 2016. These engines are commonly found in medium-duty trucks, buses, and commercial vehicles that rely on SCR systems for emissions control.

Installation Notes
Allow the exhaust system to cool completely before beginning service. Remove the existing outlet module and inspect nearby components such as sensors, clamps, and exhaust connections for buildup or damage. Install the replacement unit using proper seals and hardware to ensure correct alignment. After installation, clear any stored fault codes and verify system operation with diagnostic tools.

Final Thoughts
The outlet section of the SCR system plays an important role in maintaining proper exhaust flow after emissions processing. The Cummins ISB 6.7L SCR Outlet Module (OEM 4354073) helps ensure gases exit the system smoothly, supporting consistent aftertreatment operation and reliable emissions control.