lol, it took me a while to figure out what SRI was. also for a while i didnt know what CAI was. and im too afraid to ask so i always figure it out on my own, after a long time of not knowing, lol. i still dont know what IMO stands for though. POS, i do know, lol. and in regards to this thread, if you want 5 extra bhp, do it, even if its gonna cost you like 2 hundred bucks or so.