alright so ive always been partial to the k/n kits for all my cars well me and my step dad are messing aorund with a recently purchased 06gt. well for xmas i said hell with him getting shitty gifts and want to buy a cai to start the ball rolling. i noticed the roush cai as well and its not a huge difference in price i was wondering if there is any noticeable difference. any one have suggestions? so far it only has a steeda exhaust on it, plans are twin blade tb, cai, header back exhaust, gears and a tune so go from there thanks guys