Emissions Reimagined: Cummins ISX DOC (2011–2013)
What is it?
The Cummins ISX Diesel Oxidation Catalyst (DOC) for 2011–2013 engines helps convert carbon monoxide (CO) and unburned hydrocarbons (HC) into safer gases before the exhaust gases reach downstream systems.
Why choose this DOC?
Engineered specifically for ISX engines produced between 2011 and 2013, this DOC offers the right catalytic conversion profile while maintaining optimal airflow. Selecting the correct unit helps prevent backpressure issues, protects downstream components, and reduces the chance of system faults often caused by mismatched parts.
Key Benefits
✅ Matches Cummins ISX engines (2011–2013)
✅ Transforms CO and HC into less harmful exhaust gases
✅ Supports performance of downstream DPF or SCR systems
✅ Strong construction resists heat and long duty cycles
✅ Direct-fit design ensures accurate installation
Applications
This DOC is ideal for heavy trucks, vocational vehicles, and industrial machinery powered by ISX engines built between 2011 and 2013. It serves as the first oxidation stage in your exhaust aftertreatment chain.
Installation Notes
Always begin on a fully cooled engine and exhaust system. Remove the existing DOC and inspect adjoining pipes, flanges, sensors, and seals for wear. Install the replacement using fresh gaskets, torque all fasteners to Cummins specifications, and confirm a tight seal. After installation, clear any diagnostic codes and perform a drive or regeneration cycle to validate performance.
Final Thoughts
For your ISX engine, this DOC provides the conversion strength, durability, and proper fit you need to keep your emissions system operating cleanly and reliably.