Dear All,

Does anyone know what the maximum boost (psi/.bar)for a WRx Sti5 should be?.
I have heard of Sti's running 20-22psi , possibly in a scrambled mode?

I would like to know what is the safest / best combination to go for....
Bearing in mind that I have an AFR module (running rich) and plan on have Water Injection fitted... along with the neccesary HKS module bits....

ALL Replies welcome!