Cleaner Power in Every Mile: Cummins ISX DOC (2011–2013)
What is it?
The Cummins ISX Diesel Oxidation Catalyst (DOC) for 2011–2013 is the first stage in your engine’s emissions system. It converts harmful gases—such as carbon monoxide (CO) and unburned hydrocarbons (HC)—into cleaner exhaust before they move through the rest of the aftertreatment system.
Why choose this DOC?
Designed specifically for Cummins ISX engines built between 2011 and 2013, this DOC provides efficient oxidation without compromising exhaust flow. Choosing the correct replacement helps protect downstream filters, prevent backpressure, and reduce diagnostic faults that may arise from mismatched components.
Key Benefits
✅ Designed for Cummins ISX engines (2011–2013)
✅ Converts CO and hydrocarbons into cleaner, safer gases
✅ Enhances performance of downstream DPF or SCR systems
✅ Rugged design withstands extreme heat and long-term operation
✅ Direct-fit construction ensures quick and precise installation
Applications
Ideal for heavy-duty trucks, commercial fleets, and industrial vehicles powered by Cummins ISX engines from 2011–2013. This DOC serves as the foundation for your emissions system, promoting cleaner, more efficient engine performance.
Installation Notes
Only install when the engine and exhaust are fully cooled. Remove the old DOC, inspect connecting pipes, seals, and sensors for wear, and install the replacement using fresh gaskets. Torque all bolts to Cummins specifications and confirm proper sealing. After installation, clear any diagnostic codes and perform a drive or regeneration cycle to verify system efficiency.
Final Thoughts
For ISX engines, this DOC offers the strength, precision, and dependability needed to maintain clean emissions and smooth performance—mile after mile.