HID conversions can require some interesting rewiring....if you feel the headlights aren't "bright" enough, try a set of GE Nighthawk halogens. If they aren't "blue" enough, try a set of illegal PIAA 9005's and 9006's. Put your car on a lift and study the exhaust from the cat back. Imagine you cut the Y pipe at each muffler inlet and install aftermarket mufflers and tips. Great. BUT, what have you done to remove the restriction created by the after-cat factory tube and remaining Y ? (and that restriction exists at WOT 6K rpm+ only.....) It may sound "good", but don't bank on any performance increase...It's all fun, but there's no easy road to a 12 second F-body N*.