Keep Your Diesel Running Clean with Cummins ISC 8.3 ISL 9 DOC 2011–2013
What is it?
The Cummins ISC 8.3, ISL 9 Diesel Oxidation Catalyst (DOC) plays a vital role in reducing harmful emissions and maintaining clean exhaust flow. It converts hydrocarbons and carbon monoxide into less harmful gases, helping your diesel engine run efficiently while staying within EPA emissions standards.
Why choose this DOC?
Tailored for 2011–2013 Cummins ISC 8.3 and ISL 9 engines, this DOC offers a direct-fit design and proven reliability. It helps restore proper emissions function, minimizes soot buildup, and ensures your exhaust system operates smoothly—keeping your vehicle compliant and efficient.
Key Benefits
✅ Converts exhaust gases into cleaner emissions
✅ Supports optimal engine efficiency and airflow
✅ Built to handle extreme heat and high workloads
✅ Direct-fit replacement for quick installation
✅ Meets or exceeds OEM specifications for lasting reliability
Applications
Perfect for Cummins ISC 8.3 and ISL 9 engines (2011–2013) found in buses, vocational trucks, and other commercial diesel vehicles that require steady performance and dependable emissions control.
Installation Notes
Before installation, clean the exhaust system thoroughly to remove soot or debris. Use new gaskets and clamps for a secure fit, and check for leaks once installation is complete. Running a system check afterward ensures proper DOC function.
Final Thoughts
When your Cummins engine starts showing signs of reduced exhaust flow or failed emissions tests, replacing the DOC is the solution. The Tamerx Diesel Oxidation Catalyst restores clean operation, reliable emissions control, and lasting durability—keeping your diesel engine ready for the long haul.