Enhance Emissions Control with Cummins X12 X15 DOC
What is it?
The Diesel Oxidation Catalyst (DOC) for the Cummins X12 and X15 engine platforms is a critical component in the exhaust after-treatment system. It oxidizes hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream, helping protect downstream components and maintain efficient emissions performance.
Why choose this DOC?
Tailored for Cummins X12 and X15 engines, this DOC ensures accurate fitment and reliable operation. A failing or clogged catalyst can increase back-pressure, trigger fault codes or shorten the life of downstream filters. Replacing it restores system balance and supports long-term performance.
Key Benefits
✅ Converts HC and CO into less harmful gases
✅ Protects DPF, SCR and other downstream emissions parts
✅ Helps reduce back-pressure and exhaust system strain
✅ Direct-fit replacement—no modifications needed
✅ Built for heavy-duty duty-cycles and high temperatures
Applications
Ideal for medium to heavy-duty trucks powered by Cummins X12 or X15 engines where emissions control, system reliability and efficient exhaust flow are essential.
Installation Notes
Allow the exhaust system to cool completely before servicing. Inspect the catalyst housing and connections for wear or deposits. Replace gaskets, clamps and seals during installation. After installing the new DOC, clear fault codes and monitor system diagnostics to confirm correct operation and proper exhaust flow.
Final Thoughts
If your exhaust system is showing signs of restriction, after-treatment fault codes or reduced efficiency, installing the correct DOC for your engine model is critical. It restores healthy exhaust flow, supports emissions compliance and keeps your vehicle running reliably.