Cummins B6.7 DPF

Reliable Emissions Catalyst for the Cummins B6.7 Engine

What is it?
The Diesel Oxidation Catalyst (DOC) for the Cummins B6.7 engine is a key emissions-control component. It converts hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream into cleaner, less harmful gases, helping ensure the after-treatment system functions smoothly and reliably.

Why choose this DOC?
Built specifically to match the Cummins B6.7 engine platform, this DOC offers accurate fitment and dependable emissions-system support. A worn, clogged or improperly fitted catalyst can cause elevated exhaust restriction, frequent regeneration events, or emissions-related fault codes. Installing the correct DOC helps restore steady exhaust flow, protect downstream components and maintain system stability.

Key Benefits
✅ Converts HC and CO into cleaner exhaust output
✅ Supports the proper function of downstream after-treatment components
✅ Helps maintain stable exhaust flow and reduce restriction
✅ Direct-fit design — no modifications required
✅ Designed for heavy-duty, high-temperature operating conditions

Applications
Ideal for medium-duty trucks, vocational equipment, buses and other machines powered by the Cummins B6.7 engine—particularly in setups where emissions compliance and reliable system behavior are essential.

Installation Notes
Ensure the exhaust system and after-treatment components have fully cooled before beginning service. Inspect the DOC housing and adjacent exhaust hardware for soot accumulation, damage or leaks. Install the new unit using fresh clamps, gaskets and seals. After installation, clear any emissions-system fault codes and verify correct exhaust-system behavior via diagnostic checks.

Final Thoughts
If your B6.7-equipped vehicle is experiencing emissions alerts, elevated exhaust restriction, or inconsistent after-treatment system behavior, replacing the DOC with a correctly matched, high-quality unit is a practical step toward restoring clean, reliable exhaust flow. This component plays a vital role in preserving the integrity of the emissions-control chain and supporting dependable operation.