Optimize Emissions Flow with Cummins ISB 6.7 DOC
What is it?
The Diesel Oxidation Catalyst (DOC) for the Cummins ISB 6.7 engine is a key aftertreatment component that helps convert hydrocarbons and carbon monoxide in exhaust gases into less harmful compounds, supporting downstream treatment and improving exhaust flow.
Why choose this DOC?
Designed precisely for the ISB 6.7 engine, this DOC ensures accurate fitment and stable emissions performance. When a catalyst becomes clogged or degraded, you may face increased exhaust restriction, elevated back-pressure, or frequent fault codes. A proper replacement helps keep your system operating efficiently.
Key Benefits
✅ Converts harmful exhaust gases into cleaner output
✅ Protects downstream DPF and SCR components
✅ Helps lower exhaust restriction and back-pressure
✅ Direct-fit design—no modifications needed
✅ Built to handle heavy-duty conditions and high operating temperatures
Applications
Ideal for trucks, buses, and industrial equipment equipped with the Cummins ISB 6.7 engine, where emissions compliance and system reliability are vital.
Installation Notes
Allow the exhaust system to cool before servicing. Inspect the DOC housing and connections for soot, damage, or corrosion. Replace all gaskets and clamps to ensure a secure seal. After installation, clear any fault codes and verify system behavior and exhaust flow.
Final Thoughts
If your ISB 6.7 engine is experiencing emissions system restrictions, frequent aftertreatment fault codes, or reduced exhaust efficiency, replacing the DOC with a correct-fit unit is essential. This part helps restore system flow and supports long-term reliable performance.