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
sorry for spamming here
but i recently brought wrong roll cage and it seems for fd3s
brand cusco
6 point type
anyone int feel free to pm me or call 012-6477 837