Being in this lovely state means you have 2 choices. One a dealer cat. OR an aftermarket unit that is CARB approved. Cannot "legally" use anything else in N.Y. Unless it's a federal emissions vehicle
"Federally certified new aftermarket catalytic converters may still be used on vehicles with a federal only certification"
(if the emissions sticker has California anywhere on it you have to use OEM or CARB certified)
I've used aftermarket units and not had an issue IF they were good ones. Plus under the new law the aftermarket units have to carry a 5y/50,000m warranty that covers performance as well as construction problems.
However I would probably test the O2 sensors and maybe run a 5 gas test on the exhaust to be SURE the cat is bad first.
Wednesday, October 25th, 2017 AT 5:26 PM