Do all S4 turbo's have a vacuum line that feeds both front and rear rotors above the BAC valve?? I read somewhere that there it is vac nipple above the bac but i was unable to see it when i looked. Maybe i was being a bit ignorant but i could have swore i didnt see one. If anyone has any input i would appreciate it. Thank you.

 

Check right beneath the BAC, there's a nipple there on my S4 TII.

 

Not my engine. Looks too good. But you can see the vacuum lines.

 

Ahhh, thanks fellas.