atx370z

Ok, so i am about to purchase GTM's TT kit for my Z.

Thinking of going with Stage 1 with 10.5 psi spring and Tial BOV's.

I'm looking for around 550rwhp. Will stage 1 get this done at 10.5psi?

Will it benefit me any if i bump the turbo to stage 2 and keep the 10.5 psi spring? Or if i up the turbo should i go with the 11.6 psi spring?

I'm just trying to get the most out of the stock motor while staying somewhat conservative. If stage 1 will do this... then so be it. But if i can upgrade the turbo, up the boost a couple of psi and squeeze out close to 600 rwhp safely (within reason)... then hell why not?

Just want to do it right the first time and not get used to the car then have to upgrade later.

Also, is there anything else that is absolutely necessary or recommended to purchase and have installed with this turbo kit?

Clutch, flywheel, fuel system upgrades? I have an oil cooler, but i think it's the smallest one stillen makes. I'm assuming i should upgrade to a larger one?

Again, just want to make sure i do things right the first time. Most likely going to take the car to Dallas and let imported performance tear it apart while i drive around a rental until they are done.

Any and all advice would be appreciated. Sorry if these are newb questions... but i just want to hear from some guys that have real world experience.

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Berk HFC & CBE, Stillen G3's, AMS Crank Pulley, JWT Flywheel,
4.08 Gears, UpRev, H&R Springs and 20mm Spacers, JDM
Rear Fog, EVO-R Front Lip and CF Upper Cover, 305's