GTR injectors and resistor pack. Nistune ECU, Fuel pump 040 should do, Only change the coil packs if they are a problem.
3" Turbo back exhaust. And pretty sure you'll need to slightly bigger turbo.
Injectors should cost you no more than $300
Nistune $220 <- Fit it your self and pay around $500 - 800 for tuning
040 should cost around $200