Cummins QSB 6.7L, ISB SCR Filter 2011-2017: OEM 5418585

Engine-Specific Exhaust Conditioning for Cummins QSB 6.7L & ISB Engines (2011–2017)

What is it?
The Cummins QSB 6.7L & ISB SCR Filter (2011–2017), identified by OEM part number 5418585, is an aftertreatment component that supports nitrogen oxide (NOx) reduction in Cummins QSB 6.7L and ISB diesel engines built between 2011 and 2017. Located upstream of the Selective Catalytic Reduction (SCR) catalyst, this filter helps prepare exhaust gases so that they can be effectively processed through the SCR system with the aid of Diesel Exhaust Fluid (DEF).

Why choose this SCR Filter?
Manufactured to Cummins’ original specifications for the QSB 6.7L and ISB platforms, this SCR filter ensures accurate fitment and dependable interaction with DEF dosing hardware, emissions sensors, and engine control systems. Over time, soot, ash, and combustion byproducts can accumulate in the filter, diminishing its ability to manage exhaust conditioning. Choosing the right OEM-specified SCR filter can help maintain smoother exhaust behavior and support coordinated SCR function.

Key Benefits
✅ Designed for Cummins QSB 6.7L & ISB aftertreatment systems (2011–2017)
✅ Helps condition exhaust gases ahead of NOx conversion
✅ Supports coordinated interaction with DEF dosing and emissions sensors
✅ Direct-fit replacement — no modifications required
✅ Built for continuous operation in heavy-duty exhaust environments

Applications
This SCR filter is suitable for medium- and heavy-duty trucks and equipment powered by Cummins QSB 6.7L or ISB engines manufactured between 2011 and 2017. Typical uses include delivery vehicles, vocational rigs, regional transport fleets, and other commercial platforms where regulated emissions control and dependable aftermarket performance are essential.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to cool completely to avoid injury or component damage. Remove the existing SCR filter and inspect surrounding DEF lines, sensor connections, and mounts for signs of wear or soot buildup. Install the replacement filter using proper seals and clamps to ensure a tight, leak-free fit. After installation, clear any stored system codes and verify correct SCR operation via diagnostics.

Final Thoughts
If your Cummins QSB 6.7L or ISB-equipped vehicle is experiencing NOx-related alerts, fluctuating emissions readings, or uneven aftertreatment performance, replacing the SCR filter with the correct OEM-specified part can help restore more consistent exhaust conditioning and smoother SCR system behavior. The Cummins QSB 6.7L & ISB SCR Filter (OEM 5418585) plays a key role in managing regulated exhaust chemistry and supporting dependable engine operation across varied duty cycles.