Does anybody know the details on selling/buying a used catalytic converter?? I would be selling the stock main cat from the rx7 to someone else who is putting it on the same model rx7. I know there are legalities about shops doing this and installing them but what about a private citizen??
Its a violation of EPA law to sell a used cat. They have to go through a testing process before use which cost more than a new one.
heres the + side- Fed. EPA doesnt investigate anything thats not worth millions of dollars in fines. I dont think they even have local investigators.
No one see’s nuthin. Hell, running without a cat. is supposed to be a big no no but a lot of people still do it. Pauly is dead on though. As he should be, 
I’ve tried to get one from pretty lenient salvage yards with no success. But, you can get a pretty penny for a cat. (esp the newer ones) when you sell em to the guys that do strapping.
Its illegial to sell a used cat? whoops… i sold mine in ebay a while back…
I got mine off a subaru that was being parted out
I think it’s just illegal to install one. Thats why you can still buy them on eBay used- it states that they are for scrap use only. Salvage yards can’t sell them though. Install it- no one is going to know.
Not to thread hijack, but I have like 4 cats I need to get rid of, anyone know where I can get top dollar for them?