Naturally Aspirated
70mm throttle body on jdm d15b vtec yay or nay?
been thinking to upgrade my throttle body to 70mm and port match
do you guys know if i will gain or lose hp?
or i need to tune it to gain?
need opinions :) thank you
if nay why?
engine spec:
scrower stage 2 camshaft
crower valve spring
4 2 1...