I don't really know anything about tuning so any all help is welcome, I have y8/y7 mini me in my ek my mods are intake, sk2 intake manifold, spoon header, 2 1/4 piping to a 06 si muffler a p28 is the ecu I'm running, my ? Is I want to run a gsr throttle and tune it with a apexi vafc, do I need to upgrade anything in my fuel system? I have 450 dsm injectors just chillin

 

Your stock injectors will be perfect for your application.
Concerning the throttle body, upgrading to a gsr throttle body would yield almost no gain.

 

Thanks man I guess I'll stick with my stock throttle