ive seen pics of turbo kits...and usually they come with a customized intake pipe ....<dont hold me to that>...so you really dont need to get a CAI...unless if you ever get a turbo would like to chop it in pieces and stuff....and dont get headers...thatll be a waste of money...turbo kits come with their own header manifold....just replace like pulleys(underdrive especially, fuel injectors, fuel rails, etcetc...)..and like in the other cases...if you get the right kit...itll come with most of that...I just dont want you to wsate your money in the long term........