Hey there i have question my cars a 13b jdm rx7 s6

Is it nessary to get upgrade my


Injectors
Fuel Pump
Intercooler

and do i need to tune my car? i have been told u dont need to if i use a s5 turbo,


to run a single turbo im only looking for about 200 - 250kw so under 340 hp on a to4e turbo

 

Injectors - yes
Fuel Pump - you should
Intercooler - The stock one is useless after 275HP
Tune - This is a Joke right? You should have a tune even when installing a cat-back exhaust.

 

thanks