my buddy works for a garage and can get me a custom exhaust that is a turbo back no cat converot 1 muffler 2.75" ceramic coated inside and out for my 2000 a4 1.8t quattro. only problem is will my cel light come on i know in my cobra they sold o2 sims for this reason but i cant find one for my car. has anyone here removed cat and what did you do about o2 sensor??

I don't know exactly where to get them, but I have come across them in alot of searches. I would buy a test pipe and have him do a test pipe back system. That way, when you need to sell the car or get an inspection, you can throw a CAT in real quick

I haven't tried them yet. Came in a pair, and I think John Bass wanted the other one....but if you're willing to part with about $20 it's yours.