MREV2, Spacer, Tune (around 1000-1200$)

FI if you got the money.

 

People keep saying 5/16 Spacer, I am about to buy the 1/2 inch, is the 5/16 better ?
Please explain ( i have a 03 6sp brembo coupe)

 

1/2 " will not allow the motor cover to go back on w/o cutting and will lose more bottom end...so ive read at least..do a search on it

 

if you want to feel a difference, get a supercharger or turbo.that is the best bang for your buck, as the thread title says. plenum will make a bit of a difference, but $ for $, forced induction is a much bigger bang for the buck.