LOL, considering a COROLLA S because of its aftermarket support, thats the funniest thing ive heard all day. come on man, the slowest stock acura is still quicker than a corolla S, modded or not, what are you smoking? i'm willing to bet a corolla S 5-speed with TRD intake/exhaust/springs is still slower than a stock base RSX, auto

according to sema dealers can't simply void your warranty because you have aftermarket parts or not. even still, dealers vary in how cool they are with mods but nowadays are becoming more and more liberal with it, so as long as you dont start modifying internals you have nothing to worry about