thanks for that info chaps. thats really helpful. I've just moved from a 1997 VVT-i manual soarer into this, and am loving it. i already have the stereo from my soarer (double din Alpine unit, Focal front splits, 12" sub in a tube, couple of amps) that sort of thing. i mainly want to get the CAI just to help in the breathing of the engine just before lift hits. it would be awesome to change the lift from 6200 to 5200, coz in the 5400 - 6000 rpm it just feels a little asthmatic. i'm a pretty big DIY person, and if i can make it, i will. i have access to a computer routing machine so will be making up some MDF speaker adapters so i don't have to wreck the factory speakers. other than that, i'm going to be "borrowing" the 17" enkei's off my mums AE111 levin, coz, well, i need bigger rims than her :P as for exhausts, is just a better flowing muffler suited, coz the factory system looks pretty darn good from what i saw underneath the car today. thanks guys for the input