Cummins ISX DOC 2011-2013

Catalyst Upgrade for Cummins ISX Engines (2011–2013)

What is it?
The Cummins ISX Diesel Oxidation Catalyst (DOC) for 2011–2013 engines plays a vital role in your emissions system. It transforms carbon monoxide (CO) and unburned hydrocarbons (HC) into less harmful gases before the exhaust reaches downstream components like the DPF or SCR.

Why choose this DOC?
Engineered specifically for Cummins ISX engines from 2011 to 2013, this DOC ensures efficient oxidation while maintaining smooth exhaust flow. Choosing the correct fit helps protect other emission components, prevents backpressure buildup, and reduces diagnostic errors caused by mismatched parts.

Key Benefits
✅ Designed for Cummins ISX engines (2011–2013)
✅ Converts CO and HC into safer, cleaner exhaust gases
✅ Enhances downstream emission system performance
✅ Durable build withstands high temperatures and extended use
✅ Direct-fit design simplifies installation and alignment

Applications
Ideal for heavy-duty trucks, buses, and industrial vehicles powered by Cummins ISX engines between 2011 and 2013. This DOC serves as the first catalytic stage in your vehicle’s emission control process, ensuring cleaner and more efficient operation.

Installation Notes
Always begin installation on a completely cooled engine and exhaust system. Remove the old DOC, inspecting nearby pipes, flanges, and sensors for wear or damage. Mount the new unit with fresh gaskets, torque bolts to Cummins specifications, and ensure all seals are tight. After installation, clear any fault codes and complete a drive or regeneration cycle to confirm proper system performance.

Final Thoughts
Keep your ISX engine running clean and compliant with this high-quality DOC replacement. Built for longevity and precision fit, it helps restore your emission system’s efficiency and reliability from the gr