Cummins QSB6.7 DOC Rebuild
New England Supply House rebuilds the catalytic converter for the Cummins QSB6.7 — send us your existing core and we’ll rebuild it with new internals, built to meet EPA emissions standards, typically for a fraction of OEM cost.
How the rebuild works
Core exchange is required — we rebuild your catalytic converter, so we need your core to complete the job.
- Get a quote. Tell us your engine model and the machine it’s in, and we’ll reply with a price.
- Ship us your catalytic converter core (with tracking and insurance).
- We rebuild it with new internals, built to meet EPA emissions standards.
- We ship it back — usually within 3–5 business days of receiving your core.
Machines that run the Cummins QSB6.7
The Cummins QSB6.7 (6.7L) is a Tier 4 diesel with a diesel oxidation catalyst (DOC). It powers Vermeer BC2100XL chippers, Bandit Beast grinders, excavators, wheel loaders, and generator sets. If your machine runs the Cummins QSB6.7, we can rebuild its converter. The catalyst is on Tier 4 builds (roughly 2013 and newer); pre-Tier 4 (Tier 3) versions of these engines don’t have one, so confirm your engine year or serial with us before shipping your core. This is not a complete list — call 774-701-6374 with your engine data tag and we’ll confirm.
Pricing: Off-road converter rebuilds are quoted per engine and converter — call 774-701-6374 for your price.
Why rebuild instead of buying new
| New OEM converter | NESH rebuild | |
|---|---|---|
| Cost | Full dealer price | Save vs. OEM |
| Turnaround | Often weeks via a dealer | ~3–5 business days after we get your core |
| Emissions | OEM | Built to meet EPA emissions standards |
| Backing | Manufacturer | Warranty against manufacturing defects |
Get your quote
New England Supply House rebuilds the catalytic converter for any Tier 4 off-road engine. Tell us your engine model and the machine it’s in and we’ll reply with a price.
Get your quote → or call 774-701-6374
We rebuild catalytic converters (diesel DOC and 3-way) for wood chippers, stump cutters, mulchers and off-road equipment across all major engine brands — Caterpillar, Cummins, John Deere, Kubota, Deutz, Perkins, Kohler and more. See our catalytic converter rebuild program.