Cummins ISB 6.7 DOC 2014-2017

Emissions Control for Cummins ISB 6.7 (2014–2017) – DOC Assembly

What is it?
The DOC (Diesel Oxidation Catalyst) for Cummins ISB 6.7 engines produced from 2014 to 2017 is an emissions control component designed to oxidize hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream. It is part of the aftertreatment system and is installed upstream of the DPF and SCR to reduce pollutant levels before further treatment.

Why choose this genuine DOC?
This DOC is engineered to Cummins’ OEM specifications, ensuring proper exhaust flow, correct backpressure, and durability. A genuine unit maintains compatibility with engine control and emissions systems, preventing diagnostic errors, performance problems, or early failure often caused by low-quality aftermarket components.

Key Benefits
 ✅ Direct-fit for Cummins ISB 6.7 (2014–2017)
 ✅ Efficient oxidation of HC and CO before secondary treatment
 ✅ Optimal exhaust flow with correct backpressure characteristics
 ✅ Rugged materials designed for high‑temperature operation
 ✅ Compatible with factory diagnostics and emissions control systems

Applications
Used in medium-duty trucks, vocational vehicles, and service fleets powered by Cummins ISB 6.7 engines from 2014 through 2017. The DOC plays a vital role in meeting emission standards and ensuring the proper function of downstream DPF and SCR systems.

Installation Notes
Installation should be done by a qualified technician. Allow the exhaust system to cool before removal. Remove the old DOC, and inspect and clean the mating surfaces. Replace any necessary gaskets, seals, or clamps. Install the new DOC unit with correct alignment and torque according to Cummins specifications. After installation, check for exhaust leaks, verify sensor readings (if applicable), and clear any emissions system fault codes via diagnostics.

Final Thoughts
If your ISB 6.7 engine is showing emission system warning lights, diagnostic trouble codes, or inefficient exhaust behavior, installing the correct DOC for 2014–2017 is essential. With factory-level design and fitment, this DOC assembly ensures cleaner exhaust, more reliable performance, and support for your entire emissions system.