I own a my97 gt 155kw and bought now some engine parts from a sti v4 (heads, block, upgrades oil pump and so on). Need now some forged pistons and rods, have at home s fmic, walbro pump, racing headers and a 3" decat exhaust and an hks f con z. Now the real question is what injectors and turbo do I need to get 400-450bhp? The 440s injectors would be not enough to get this? And will it be possible to get this with the hks ecu (piggy back).

Thanks