Cummins ISC 8.3, ISL 9 DOC 2011-2013

Cleaner Exhaust, Stronger Performance with Cummins ISC 8.3 ISL 9 DOC 2011–2013

What is it?
The Cummins ISC 8.3, ISL 9 Diesel Oxidation Catalyst (DOC) is an essential emissions component that keeps your diesel engine clean, efficient, and compliant. By converting harmful gases into less toxic emissions, it ensures your engine meets EPA standards while maintaining reliable operation and fuel efficiency.

Why choose this DOC?
Designed specifically for 2011–2013 Cummins ISC 8.3 and ISL 9 engines, this DOC delivers a direct-fit solution that restores exhaust flow and proper aftertreatment function. It helps prevent performance issues caused by a clogged or failing catalyst, giving your vehicle consistent power and cleaner operation.

Key Benefits
✅ Reduces carbon monoxide and hydrocarbon emissions
✅ Promotes cleaner combustion and efficient performance
✅ Built to withstand high exhaust temperatures
✅ Direct-fit design for fast, easy installation
✅ Meets OEM standards for quality and durability

Applications
Perfect for Cummins ISC 8.3 and ISL 9 engines (2011–2013) found in buses, vocational trucks, and other medium-duty diesel vehicles that demand long-term reliability and emissions compliance.

Installation Notes
Before installation, inspect and clean all exhaust connections. Replace worn gaskets and clamps to ensure a tight seal. After installation, perform a full system check to verify proper airflow and emissions performance.

Final Thoughts
If your Cummins engine is showing signs of poor exhaust flow or failing emissions tests, it’s time to replace your DOC. The Tamerx Diesel Oxidation Catalyst offers OEM-grade construction and dependable fitment, helping you maintain clean operation and strong performance mile after mile.