With the mods that you have, you should already be close to that hp range.
I've got, an HKS iintake, custom hard intercooler piping, HKS SSQV, Boost controller set to 21 lbs, RSR downpipe w/cat delte, and RSR cat back, and i'm in the 330 range, runnin 8.20's in the eight mile.
SO, if u wanna retain the stock turbo and ecu, just get an exhuast manifold, and 02 housing, that should get you what you want.
I've got, an HKS iintake, custom hard intercooler piping, HKS SSQV, Boost controller set to 21 lbs, RSR downpipe w/cat delte, and RSR cat back, and i'm in the 330 range, runnin 8.20's in the eight mile.
SO, if u wanna retain the stock turbo and ecu, just get an exhuast manifold, and 02 housing, that should get you what you want.