i picked up a y8 manifold to use on my z6, and i have a couple of questions about the swap.. first, the y8 doesnt have the pcv in the manifold?? and what is up with the tiny holes in the flange that go into the ports? they all meet in the middle i guess and there is a vac line fitting there but i cant see a purpose for it. what intake gasket do you use as well, z6, y8?

 

PCV came out of the block on Y8's, You must have a 2000 Y8 manifold because those are air injection holes. They must be plugged. I think the Z6 gasket should work fine.

 

ok so plug the holes. but the z6 gasket doesnt go all the way up to them on the flange. it will leave them open next to the head. and what should i do about the pcv then? thanx for your help

 

i just did this on my z6 head with the same mani. i ran the pcv to a catch can which goes to the inlet side of the turbo.. for the tiny injection holes, i just used jbweld. the z6 gasket is fine to use.