[quote=CKxx;31020256]You still haven't said if you want 300 CRANK hp, or 300 WHEEL hp.
No, STi pinks are not "plug and play."
FOR 300 WHEEL HP (easy 300):
Catless up-pipe, catless turbo-back exhaust, EVO316G, 650cc injectors, STi (or larger) TMIC, Walbro pump, ECU tune.
^ this im running this setup with a blouch evo III big 16g dw 780cc inj precision front mount, cobb intake, and tial 38mm ewg and made 330whp at 20psi. this will cost you quite a bit to get to this, a protune alone on a dyno run about $450. good luck