alright, so to clarify...I have a 96 GSR, it was not sold in CA. So I should have no O2 plugged into the header anywhere? jsut the cat? I'm getting a stainless greddy header to replace my buzzing A-pipe. Otherwise, my car is completely stock. I'm just curious...by getting an aftermarket header rather than a factory a-pipe, do you think I'm running the risk of having any problems such as burning out O2 sensors or any other related problems? that might not make sense, but I don't know much about it. I'm just a little nervous about bolting on this header and having some problems pop up as a result...I guess because the rest of my exhaust will be stock and I'm worried that the higher flowing cat won't jive with the rest of the exhaust and start giving me CEL's all the damn time, messing up the air fuel mixture, etc.