Cummins QSB 6.7L, ISB SCR Filter 2011-2017: OEM 5418606

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

What is it?
The Cummins QSB 6.7L & ISB SCR Filter (2011–2017), carrying OEM part number 5418606, is an emissions aftertreatment component engineered for Cummins QSB 6.7-liter and ISB diesel engines produced between 2011 and 2017. Installed upstream of the Selective Catalytic Reduction (SCR) catalyst, this filter helps prepare exhaust gases so nitrogen oxides (NOx) can be efficiently reduced when Diesel Exhaust Fluid (DEF) is introduced downstream.

Why choose this SCR Filter?
This SCR filter is manufactured to Cummins’ original specifications for both the QSB 6.7L and ISB platforms, ensuring proper fitment and reliable interaction with DEF dosing hardware, emissions sensors, and engine control systems. Over time, soot, ash, and combustion byproducts can accumulate in the filter and reduce its ability to condition exhaust flow. Selecting the correct OEM-specified SCR filter helps support smoother exhaust handling and more consistent emissions treatment.

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 components and emissions sensors
✅ Direct-fit replacement — no modifications required
✅ Built for heavy-duty exhaust environments

Applications
This SCR filter is ideal for medium- and heavy-duty vehicles equipped with Cummins QSB 6.7L or ISB engines built between 2011 and 2017. Common applications include delivery trucks, vocational work vehicles, regional transport rigs, and other commercial platforms where regulated emissions performance and consistent exhaust conditioning are essential.

Installation Notes
Before beginning service, allow the exhaust and aftertreatment system to cool completely to avoid burns or component damage. Remove the existing SCR filter and inspect adjacent DEF lines, sensor connections, and mounting hardware for soot buildup, wear, or damage. Install the replacement filter using proper seals and clamps to ensure a secure, leak-free fit. After installation, clear any stored system codes and verify correct SCR system behavior with diagnostic tools.

Final Thoughts
If your Cummins QSB 6.7L or ISB-equipped vehicle is showing NOx-related warnings, uneven emissions readings, or irregular aftertreatment performance, replacing the SCR filter with the correct OEM-specified part can help restore steadier exhaust conditioning and smoother emissions system responses. The Cummins QSB 6.7L & ISB SCR Filter (OEM 5418606) plays a key role in managing regulated exhaust chemistry and supporting dependable engine operation across varied duty cycles.