Ok
Here is your answer..BANG FOR BUCKS
Turbo...computer..electronic boost controller .dumps..tune
If you have these
then new cat 3"Metal(free flow type),Z32 AFM,3 inch exhaust cat back.
How much power are you chasing?....And what Mods do you have?
Think of the World of Turbo's as a World of compressed air...the more you force through the better the power results....
So..Pods...New AFM...Z32 in your case..Larger front mount Inter-cooler,Better turbo,dumps,front pipe,free flow cat,exhaust..non restrictive.
(A QUOTE BRUCE LEE WOULD HAVE BEEN PROUD OF)
Then,fuel supply,fuel delivery(injectors)...tune.
Which part are you up to?