First time boosting a car and wanted some help on the parts i will need.
I know i need the turbo kit and the full exhaust.
I know that the stock internals only hold about 8 psi safely so i just wanted to know what internals and fuel upgrades are necessary to run 12 psi safely and as reliable as possible.

Want to be anywhere 300+ hp which i know is completely possible at 12 psi.

 

you dont have to upgrade internals at 300hp. you will be perfectly fine on stock motor.

as for fuel systems, id go with 650cc injectors, 550's max out at 300hp and you wont have any room for accidental over-boost as a buffer zone.

and psi is not what you should be concerned about. its power that you should be worried about. different turbos make different power at the same level of boost. but its been kind of the rule of thumb to keep it at 14 or lower on stock motor. what turbo do you plan on running?

 

HP numbers depend on the tune as well. You can be running 14 psi and only put out 260 whp if the tune is stupid rich. On the other hand, you could make 270+ on only 8 psi with something a little leaner. Of course I just pulled these numbers outta my magic hat, so don't take them as actual achievable results. Hopefully you get the point I'm trying to make.

+1 on larger injectors. You may also want to research a return fuel system to give you plenty of room for growth in the future.