hey guys i have a f20b in a ej1 and i was thinking of caming it.f20b comes with dual valve springs from factory already and do you think i need to chane the valve spriing if i was going to go with stage 2 crower.
to change or not?very little miles on engine about 37k
thanks in advance

 

Why dont you go on crower's website and see what they recommend with their stage 2 cams.