Cummins ISB 6.7L SCR Outlet Catalyst Module 2014-2017: OEM 4354313

Dependable Final-Stage NOx Treatment for Cummins ISB 6.7L Engines (2014–2017)

What is it?
The Cummins ISB 6.7L SCR Outlet Catalyst Module, identified by OEM 4354313, is a key component of the Selective Catalytic Reduction (SCR) aftertreatment system. It works with Diesel Exhaust Fluid (DEF) to help convert nitrogen oxide (NOx) emissions into nitrogen and water vapor before treated exhaust exits the system. Positioned within the outlet stage, this module helps complete the SCR process and maintain proper emissions treatment.

Why choose this SCR Outlet Catalyst Module?
Effective SCR operation depends on proper DEF dosing, controlled exhaust temperatures, and reliable catalyst activity. The OEM 4354313 SCR Outlet Catalyst Module is designed for Cummins ISB 6.7L applications from 2014 through 2017, helping maintain compatibility with surrounding factory aftertreatment components.

Repeated exposure to high exhaust temperatures, contaminants, DEF deposits, and demanding operating cycles can gradually affect the catalyst. When the module becomes damaged, contaminated, or less effective, operators may encounter elevated NOx readings, emissions warning lights, diagnostic fault codes, or derate conditions.

Choosing the correct OEM-matched catalyst module helps restore proper exhaust treatment while maintaining the fit and connections required by the existing SCR system.

Key Benefits
✅ OEM-matched SCR Outlet Catalyst Module for Cummins ISB 6.7L engines (2014–2017)
✅ Supports effective nitrogen oxide (NOx) reduction
✅ Works with DEF to support proper SCR system operation
✅ Helps maintain consistent final-stage exhaust treatment
✅ Supports dependable aftertreatment system function
✅ Direct-fit design for straightforward installation

Applications
This SCR Outlet Catalyst Module is designed for Cummins ISB 6.7L diesel engine applications from 2014 through 2017. These engines are commonly used in medium-duty trucks, buses, delivery vehicles, vocational equipment, and commercial fleets equipped with SCR aftertreatment systems. Confirm OEM number 4354313 and vehicle-specific fitment information before installation.

Installation Notes
Allow the exhaust system to cool completely before beginning installation. Inspect the DEF injector, NOx sensors, temperature sensors, exhaust connections, clamps, seals, and mounting hardware for contamination, wear, or damage. Install the replacement catalyst module using the correct seals and hardware to ensure proper alignment and secure connections. After installation, inspect for exhaust leaks, clear applicable diagnostic codes, and verify SCR system operation using appropriate diagnostic equipment.

Final Thoughts
Final-stage catalyst operation plays an important role in completing the SCR emissions treatment process. The Cummins ISB 6.7L SCR Outlet Catalyst Module (OEM 4354313) helps maintain effective NOx treatment, consistent exhaust processing, and dependable aftertreatment system operation for 2014–2017 applications.