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
a few month ago i was bought the afc 5 button from one of forummer here...but till now i still not able yet to install it into my car..the problem is because i dont know the point from the harness(each color) to the...