[NewArt]

Originally Posted by Tweetdriver63

I have an 01 non-S. I'm debating what to do with my exhaust, because both cats are bad. If I replace the manifold/pre-cats with headers, deleting those cats, what do I do with the O2 sensors? How will it affect performance if the ECU isn't getting a signal from all of the sensors?

There should be bungs on the headers for the first O2 sensors. These are definitely necessary! The absence of post cat sensors however, will not affect performance but you will get a CEL saying your cats are defective.