With these cars, its all about tuning. You can do the basics i.e. Intake, Exhaust, Injectors, Cooling. None of this will really help you though without a proper tune. When done properly, these mods will really wake your car up. Everything is controlled through the computer though, including boost.
O T T P TVS Stage 3 w/ 2.9" & 80# inj., ZZP 3" CAI, ZZP Stainless Mid-Length Header w/ 3" Catted DP, ZZP Stainless 3" Magnaflow Cat-Back, O T T P Heat Exchanger, Opt B, TTR Upper Engine Mount