Or maybe just the header, for some reason mine has a high-flow cat on one side, kind of defeats the purpose of PZEV.
I suppose I could take any stock cat and have it ghetto welded into another stock piece and put in place too. I don't know. I was getting a CEL for a while on that side, then had PRE take care of it with some ECU tuning.
Starting to feel a little guilt, given my mildly green lifestyle.