hi hi kylim8
If u want to mod your s15 to 450hp then u only need to change all your eng head set to
HKS step 3,
Greddy T67,25g turbo and
Power Fc ecu.
Hope this list can give u some ideal
Can anyone teach me to DIY the fishbone boost controler. Which one i should connect to??? If possible show me pic it will be more detail. For youe infor i'm driving mira L5