hey guys, I have searched the threads and could not find the answer to this question, if i have a HKS intake, TurboXS exhaust and BOV, what stage would you recomend on a 03 wrx ? Thanks in advance.
~30hp give or take some. The big advantage will be in the way the power is delivered, much more mid range power.
What do you mean by "exhaust?" If it includes a TXS downpipe, then use the stage 2 basemap. If not, use the stage 1 map instead.