Catalytic Upgrade for Cummins ISX Engines (2011–2013)
What is it?
The Cummins ISX Diesel Oxidation Catalyst (DOC) for model years 2011–2013 is designed to transform carbon monoxide (CO) and unburned hydrocarbons (HC) into safer emissions gases before they reach downstream treatment systems.
Why choose this DOC?
Made to fit ISX engines built between 2011 and 2013, this DOC delivers effective conversion while maintaining proper exhaust flow. Choosing the correct unit helps protect downstream components, reduce backpressure, and prevent faults caused by mismatched or inferior parts.
Key Benefits
✅ Suitable for Cummins ISX engines (2011–2013)
✅ Converts CO and hydrocarbons into less harmful compounds
✅ Supports downstream DPF or SCR systems
✅ Robust construction resists high exhaust temperatures
✅ Direct-fit installation for accurate alignment
Applications
This DOC is ideal for heavy trucks, industrial vehicles, and machinery running Cummins ISX engines manufactured in 2011–2013. It is intended as the first catalytic stage in the exhaust emission path.
Installation Notes
Work only on a cooled engine and exhaust system. Remove the existing DOC, check adjoining pipes and seals for wear, and install the replacement with fresh gaskets. Torque bolts to Cummins specifications and verify sealing. After installation, clear diagnostic codes and perform a drive or regeneration cycle to ensure proper operation.
Final Thoughts
This DOC brings the right blend of durability, conversion performance, and fitment to support your ISX engine’s emissions system and keep it running at peak compliance and efficiency.