Cummins ISB 6.7 DOC 2014-2017

Clean Emissions for ISB 6.7 (2014–2017): OEM DOC Assembly

What is it?
The DOC (Diesel Oxidation Catalyst) installed in Cummins ISB 6.7L engines from 2014 to 2017 oxidizes hydrocarbons (HC) and carbon monoxide (CO) from exhaust before these gases enter downstream aftertreatment devices like the DPF and SCR.

Why choose this OEM DOC?
This DOC is manufactured to Cummins’ exact standards so that exhaust flow, backpressure, and emissions behavior stay within factory tolerances. Choosing the OEM version helps avoid fitment issues, excess exhaust pressure, diagnostic faults, or durability failures that can arise from inferior aftermarket replacements.

Key Benefits
 ✅ Direct-fit for Cummins ISB 6.7L engines (2014–2017)
 ✅ Effective oxidation of HC & CO before further emissions control
 ✅ Maintains correct exhaust flow and backpressure balance
 ✅ Built with materials that endure high temperatures and exhaust conditions
 ✅ Compatible with factory emissions control logic and diagnostics

Applications
Used in medium-duty trucks, service fleets, and vocational vehicles powered by the ISB 6.7L engine during model years 2014–2017. It supports emission compliance and optimal performance of the exhaust aftertreatment system.

Installation Notes
Installation should be done by certified technicians. Start with a fully cooled exhaust system. Remove the old DOC and inspect flange surfaces. Clean mating surfaces thoroughly. Install the new DOC using OEM gaskets and fasteners. Torque bolts to Cummins specifications. After installation, check for leaks, confirm proper exhaust flow, and clear any emission-related fault codes.

Final Thoughts
If your ISB 6.7L engine is throwing emissions warnings, backpressure issues, or post-treatment faults, swapping in the factory-spec DOC for 2014–2017 restores proper oxidation and supports the downstream systems. It’s the correct component to bring your emissions system back to design standards.