Blown, plugged, or throwing a cat code? D&S rebuilds the converter in your original housing for about half the cost of a new OEM unit — on a core exchange, back to you in 3–5 business days.
Gas and diesel, across the major brands. Pick your machine or send us the details for an exact quote.
Rebuilt converters for Bandit hand-fed and whole-tree units.
View Bandit rebuilds →Rebuilt converters for Morbark chippers, gas and diesel.
View Morbark rebuilds →Rebuilt converters for Vermeer brush and whole-tree chippers.
View Vermeer rebuilds →Also rebuild converters on many engines: GM, Power Solutions International, Kohler, CAT, and more. Not sure? Send your machine →
On chipper engines the cat loads up with carbon and chokes exhaust flow. Common tells:
Bogs under load, slow to recover.
Can't hold rated speed.
Tier 4 derate or fault light.
Restricted exhaust, extra heat.
Chipper model and engine — or a photo / part number off the old converter and we'll confirm fit.
Ship the failed converter to us — that's the core in the exchange.
Fresh substrate in your original housing, built to meet EPA emissions standards.
Rebuilt unit returns ready to bolt on. Ships nationwide from Massachusetts.
Sell D&S rebuilds to your customers at dealer pricing, with the turnaround and warranty to back it up.
Become a dealer →About half the cost of a new OEM converter. It varies by unit — send your machine and engine for an exact quote.
3–5 business days once we receive your core.
Yes — it's a core exchange. We rebuild your original housing and send it back.
Our rebuilds are built to meet EPA emissions standards.
Deleting usually causes more headaches than it solves — running without the converter can throw the engine out of spec, and on newer Tier 4 machines it often won't work anyway (the engine monitors the cat, so it can flag a fault or drop into a reduced-power derate). There can be warranty and compliance downsides too. A rebuild gets your power back the right way for about half of OEM.
Backed by a warranty against manufacturing defects.
Send your machine and engine — or a photo of the old converter — and we'll price a D&S rebuild.
Request a quote ☎ 774-701-6374