I'm having a very difficult time finding an o2 sim for my SS. I tried to have the rear cat DTCs tuned out at benchmark but OTTP royally fucked my pcm and i don't have money for a new one (I did call ottp and they were of no help). I need to pass emissions but don't want to put my old cat back on. Is there anyone that makes an o2 sim that isn't just a spark plug anti-fouler?