If you want an extra 30-45 hp for less than a grand get a budget y pipe(21 hp peak gain!) that's the best bang for your buck for only $160 an intake $150, cat-back exhaust $600. that's about 40+ hp for about $910. having this shit installed will put you at the $1,000 mark
go to
www.turbomaxima.com i think they have 3rd gen turbo's for a lot of dough.
all the above figures are for a 4th gen but i'm sure it's all comparable
i would only get a budget y pipe. i'm under the impression that stillen and catt-man and warpspeed get their parts from budget. i may be wrong though.