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
Well well well... it is second half of the year and we been HACK busy for the past first half and NOW let us have some fun yet friendly match among us.