like that gt2530 kit you showed, you need larger intercooler and larger injectors? And about the coilovers, You need to buy all the rest of the adjustable suspention peices. Dude I dont think you know what you really have gotten your self into. From the looks of things you have no clue about the z car at all. You just cant browse through websites and be like ohhh cool hks coilovers, I have a friend with them he also has another grand just in adjustable parts. If you got the dough more power to you, but search things before you just buy them. BTW you know the motor has to come out to change turbos right??