Emission Conversion Unit for Cummins ISX Engines (2011–2013)
What is it?
The Cummins ISX DOC (Diesel Oxidation Catalyst) for the 2011–2013 range transforms carbon monoxide (CO) and unburned hydrocarbons (HC) into cleaner gases before they pass through downstream emission devices.
Why choose this DOC?
This DOC is engineered specifically for ISX engines from 2011 to 2013, offering the proper balance of conversion efficiency without restricting exhaust flow. Selecting the correct unit helps preserve downstream components, avoid backpressure issues, and reduce error codes caused by incompatible parts.
Key Benefits
✅ Tailored for Cummins ISX engines (2011–2013)
✅ Converts CO and hydrocarbons into safer byproducts
✅ Supports DPF, SCR, or other aftertreatment systems
✅ Durable build handles high heat and extended operation
✅ Direct-fit design ensures accurate installation
Applications
This DOC fits heavy-duty trucks, commercial vehicles, and industrial machines powered by ISX engines manufactured between 2011 and 2013. It serves as the initial step in the exhaust treatment process.
Installation Notes
Ensure the engine and exhaust are fully cooled before starting. Remove the current DOC and examine surrounding pipes, sensors, and seals for wear or damage. Install the new component with fresh gaskets, torque all fasteners to Cummins specifications, and ensure proper sealing. After installation, clear any fault codes and run a regeneration or drive cycle to confirm correct system behavior.
Final Thoughts
For ISX engines, this DOC provides effective oxidation, long-term durability, and the proper interface to support your full emission control setup.