Power Meets Purity: Cummins ISX DOC (2014–2017)
What is it?
The Cummins ISX Diesel Oxidation Catalyst (DOC) for 2014–2017 is the first line of defense in your emissions system. It converts carbon monoxide (CO) and unburned hydrocarbons (HC) into cleaner gases before the exhaust continues through downstream filters.
Why choose this DOC?
Engineered for ISX engines built between 2014 and 2017, this DOC ensures smooth exhaust flow while maintaining optimal oxidation performance. Using the correct unit helps protect downstream DPF or SCR systems, minimizes backpressure, and prevents diagnostic faults often caused by poor fit or low-quality replacements.
Key Benefits
✅ Designed for Cummins ISX engines (2014–2017)
✅ Converts CO and HC into environmentally safer gases
✅ Supports the performance of downstream emission systems
✅ High-strength construction resists extreme heat and vibration
✅ Direct-fit design for simple, accurate installation
Applications
This DOC is ideal for heavy-duty trucks, vocational fleets, and industrial equipment powered by Cummins ISX engines from 2014–2017. It serves as the first catalytic stage in your exhaust aftertreatment process, ensuring cleaner, compliant emissions.
Installation Notes
Start with the engine and exhaust system completely cooled. Remove the existing DOC, inspect pipes, seals, and sensors for wear, and install the new unit with fresh gaskets. Torque all bolts to Cummins specifications and confirm sealing integrity. After installation, clear any fault codes and run a regeneration or drive cycle to validate system performance.
Final Thoughts
For ISX engines, this DOC delivers the perfect combination of durability, fit, and performance—helping your vehicle run cleaner and your emissions system operate at its best mile after mile.