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
i am thinking to mod to straight flow for my Na Altezza(6MT), is it worth to do that? any other thing can improve my power besides of modding turbo or supercharge. i dont wan mod a lot, if possible wanna keep it...
I have install walbro fuel pump and sard large fuel regulator lately,b4 tis my speed can goes up to over 250km/h,but after that 5th gear around 6000rpm,i think is rpm cut already but the speed jz around 22xkm/h,how come?