Same over here, but vac has always been at 12. Andreas told me that it should read 16-20. I dont see that happening espeically having the S4's in, I think you lose vac when you run beefy cams anyway.SE-Rious B14 said:Stock BOV over here, being recirculated into the intake piping. the sound is awesome, when blows off sounds better then some aftermarket ones. Although mine is recirculated, my car tends to stall at idle after hitting the throttle. My car when idling is always between 18-20 vacuum, so any help on this problem i am having will be very helpful!!