Emission Catalyst Upgrade: Cummins ISX DOC (2008–2010)
What is it?
The Cummins ISX DOC (Diesel Oxidation Catalyst) for 2008–2010 acts to convert carbon monoxide (CO) and unburned hydrocarbons (HC) into cleaner gases before they move on through the emissions system.
Why choose this DOC?
This unit is matched precisely to ISX engines built from 2008 through 2010, delivering proper oxidation without overburdening exhaust flow. Selecting the correct DOC helps prevent backpressure problems, protects subsequent emissions components, and reduces the risk of fault codes from mismatched parts.
Key Benefits
✅ Designed for Cummins ISX engines between 2008 and 2010
✅ Converts CO and hydrocarbons into safer exhaust gases
✅ Helps safeguard downstream DPF or SCR systems
✅ Built for durability under high heat and long service intervals
✅ Direct-fit design ensures straightforward installation
Applications
This DOC is ideal for heavy trucks, buses, and industrial applications with Cummins ISX engines from 2008 to 2010. It serves as the first catalytic stage in the vehicle’s emissions treatment path.
Installation Notes
Allow the engine and exhaust system to cool fully before proceeding. Remove the existing DOC and check adjacent pipework, sensors, and seals for wear. Install the new DOC using fresh gaskets, torque all fasteners to Cummins specs, and verify all seals. After installation, clear any stored codes and perform a regeneration or drive test to confirm proper operation.
Final Thoughts
For ISX engines, this DOC is engineered to deliver consistent oxidation, longevity, and system compatibility—helping maintain your emissions system in peak condition.