Preserve Exhaust Performance on Cummins QSB 4.5L (2011–2020)
What is it?
The Cummins QSB 4.5L DOC Filter OEM 4353544 is a key part of the diesel aftertreatment system that captures soot and particulate matter from your engine’s exhaust before it continues through the emissions hardware. Installed within the Diesel Oxidation Catalyst (DOC), this filter helps reduce harmful particles, support proper oxidation reactions, and maintain cleaner airflow for smoother engine performance.
Why choose OEM 4353544?
Engineered to meet Cummins’ original specifications for QSB 4.5L engines produced from 2011 through 2020, this DOC filter ensures accurate fitment and reliable integration with your vehicle’s factory emissions system. Choosing an OEM-matched component helps support stable regeneration cycles, reduce the risk of clogging, and protect downstream emissions parts, contributing to long-term system efficiency.
Key Benefits
✅ Designed for Cummins QSB 4.5L engines (2011–2020)
✅ Helps trap soot and reduce exhaust particulates
✅ Supports efficient aftertreatment and regeneration cycles
✅ Built to tolerate high exhaust temperatures
✅ Direct-fit design for simplified installation
Applications
This DOC filter is ideal for light and medium-duty commercial trucks, service vehicles, and industrial equipment powered by Cummins QSB 4.5L engines from 2011–2020. It’s commonly found in delivery rigs, vocational builds, fleet service vehicles, and other diesel-powered applications where dependable emissions management is essential.
Installation Notes
Before beginning installation, make sure the exhaust system has fully cooled. Inspect nearby sensors, mounting hardware, clamps, and gaskets for wear or damage, and replace any worn components as needed. After installing the DOC filter, verify all connections are secure and follow manufacturer-recommended system checks to confirm proper operation.
Final Thoughts
When it’s time to replace a worn or clogged DOC filter on your Cummins QSB 4.5L engine, the OEM 4353544 offers a reliable, factory-matched solution. Designed for proper fitment and consistent performance, it helps keep your emissions system running efficiently and your vehicle road-ready. Tamerx has this DOC filter in stock and ready to ship.