Im trying to install my vacuum distribution block on my y8 but i cant find where the check valve is.... My brake booster line is solid with with no visable valve, i know on the z6 you can clearly see it right there but on the y8 theres nothing but a hose from the brake booster to the manifold...Any help guys..a picture would greatly be apreciated.

 

you can feel it in the hose. its right at where the hose sits in the bracket on the firewall.