Drive Cleaner, Run Stronger: Cummins ISX DOC (2011–2013)
What is it?
The Cummins ISX Diesel Oxidation Catalyst (DOC) for 2011–2013 engines is an essential emissions control component that transforms harmful gases—like carbon monoxide (CO) and unburned hydrocarbons (HC)—into cleaner exhaust before they pass through the rest of your aftertreatment system.
Why choose this DOC?
Designed for ISX engines produced between 2011 and 2013, this DOC ensures optimal oxidation efficiency while maintaining smooth exhaust flow. Using the proper unit prevents backpressure buildup, safeguards downstream filters, and helps avoid costly system errors caused by mismatched replacements.
Key Benefits
✅ Specifically built for Cummins ISX engines (2011–2013)
✅ Converts CO and HC into environmentally safer gases
✅ Supports the performance of DPF and SCR systems
✅ Heavy-duty construction withstands high temperatures and long service life
✅ Direct-fit design ensures simple, accurate installation
Applications
Perfect for heavy-duty trucks, vocational fleets, and industrial equipment powered by Cummins ISX engines manufactured between 2011 and 2013. This DOC serves as the first oxidation stage in your emission control system, promoting cleaner and more efficient engine operation.
Installation Notes
Work only on a fully cooled engine and exhaust system. Remove the old DOC and inspect adjacent pipes, sensors, and seals for wear or damage. Install the new unit using fresh gaskets, torque bolts to Cummins specifications, and confirm proper sealing. After installation, clear diagnostic codes and perform a drive or regeneration cycle to verify performance.
Final Thoughts
For ISX engines, this DOC delivers dependable catalytic conversion, long-lasting durability, and a precise fit—helping you keep emissions low, performance high, and compliance worry-free.