Sorry the exhaust subject is brought up again, but I am plannng on replacing my stock exhaust on the '96 gts with the new Borla 4 resonator set up. First off, I would really like to remove the cats altogether for sound, performance and heat reasons. What exactly do I need to do to make sure that a check engine light does not come? Do I have to worry about performance loss by removing them? I thought about high-flow cats, but would rather remove completely. Finallly, does that borla system come with a H-pipe built in? Any help will be appreciated.