Anyone know of any h or x pipes that r smog legal in california that will easily hook up to my Flowmaster Amer. Thund. cat back exhaust sys.? I have a 02 GT auto and want the performance and sound but without the hassels of failing smog tests...eveything else on my stang is stock except for my k&n Intake and Diablo Flashtuner (That i have yet to use...just got it)..