[JFP in PA]

Originally Posted by The Radium King

here's the page (about halfway down):

TPC Racing ATP:2 turbo kit DIY Install - Page 2 - 6speedonline.com Forums

does the aos need vacuum or just a lower pressure than in the crankcase (ie, ambient, but vented to a catch can)? i thought connection to the intake plenum was not for vacuum but to recycle any 'oily discharge' for emmissions reasons.

The manifold provides vacuum to lower the crankcase pressure, which it does via the AOS unit.