Next-Level Emission Care: Cummins ISX DOC (2011–2013)
What is it?
The Cummins ISX DOC (Diesel Oxidation Catalyst) for model years 2011–2013 transforms carbon monoxide (CO) and unburned hydrocarbons (HC) into safer gases before they’re passed on to downstream emission systems.
Why choose this DOC?
Tailored for ISX engines built between 2011 and 2013, this DOC offers effective oxidation while preserving smooth exhaust flow. Choosing the right unit helps prevent backpressure issues, safeguards downstream components, and reduces the chance of emission system faults from mismatched parts.
Key Benefits
✅ Suited for Cummins ISX engines (2011–2013)
✅ Catalyzes CO and HC into cleaner exhaust gases
✅ Supports the performance of your DPF or SCR systems
✅ Durable construction to withstand high temperatures and use
✅ Direct-fit unit for easier, precise installation
Applications
This DOC is ideal for heavy-duty trucks, service fleets, and industrial vehicles powered by Cummins ISX engines from 2011–2013. It acts as the first oxidation stage in your emissions control setup.
Installation Notes
Only install when the engine and exhaust system are completely cooled. Unbolt and remove the existing DOC, then examine pipes, flanges, sensors, and seals for damage. Mount the replacement with new gaskets, torque hardware to Cummins specifications, and verify all seals. After installation, clear error codes and run a regeneration or driving cycle to validate system performance.
Final Thoughts
For ISX engines, this DOC delivers optimized conversion, durability, and compatibility—setting the stage for a stronger and more stable emissions path.