Cummins QSB, 6.7L, 4.5L DOC/DPF 2012-2020: OEM 4353513

Support Emissions Filtration on Cummins QSB & 6.7L/4.5L (2012–2020)

What is it?
The Cummins QSB, 6.7L, 4.5L DOC/DPF 2012–2020 OEM 4353513 is a combined Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF) assembly that plays a central role in your engine’s aftertreatment system. This unit helps reduce soot, particulate matter, and other exhaust emissions while supporting proper regeneration cycles for cleaner emissions and improved engine performance.

Why choose OEM 4353513?
Engineered to meet Cummins’ original specifications for QSB, 6.7L, and 4.5L engines built between 2012 and 2020, this DOC/DPF assembly offers precise fitment and seamless integration with your vehicle’s factory aftertreatment components. Choosing an OEM-matched unit like the 4353513 helps ensure stable regeneration cycles, reduces the risk of clogging, and protects downstream emissions hardware from premature wear, supporting efficient system operation.

Key Benefits
✅ Designed for Cummins QSB, 6.7L & 4.5L engines (2012–2020)
✅ Combines DOC and DPF for efficient soot and particulate reduction
✅ Supports stable regeneration and emissions control
✅ Built to tolerate high exhaust temperatures
✅ Direct-fit design for easier replacement

Applications
This combined DOC/DPF assembly is ideal for light and medium-duty commercial trucks, service vehicles, and industrial equipment powered by Cummins QSB, 6.7L, or 4.5L engines from 2012–2020. It’s commonly found in delivery fleets, vocational rigs, construction support vehicles, and other diesel-powered applications that require dependable emissions control.

Installation Notes
Before installation, ensure the exhaust system has completely cooled. Inspect nearby sensors, clamps, gaskets, and mounting hardware for wear or damage, and replace any worn components as needed. After installing the DOC/DPF assembly, verify that 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/DPF assembly on your Cummins QSB, 6.7L, or 4.5L engine, the OEM 4353513 delivers a reliable, factory-matched solution. Designed for accurate fitment and consistent performance, it helps keep your emissions system running efficiently and your vehicle road-ready. Tamerx has this DOC/DPF assembly in stock and ready to ship.