gsr help

ok..i was thinking about t3/t4 hybrid turbonetics kit wit stock internals. how much would that cost? any suggestions on any other turbo kits for a gsr besides building one, whp? or is the t3/t4 hybrid good how much would installation cost? and tuning ?? say if i did install t3/t4 hybrid wit stock internals..it would b boosting about 6-7 psi rite? well if i put a 3 1/2 or more inch exhasut with 2.5 pipings..how much boost will mah gsr b boosting? thanx bye

k..wen i said t3/t4 hybrid i mean the FMAX