How can I tell if this intake manifold is from a D16Z6 or not?

I have a intake manifold in my garage I pulled off of a D16Z6. The back of the manifold says "P08". In my living room I have a D16Y8 head with what I thought was a Z6 manifold, but the back of the head says "P06". I looked at my friend's DX and it looks identical to both manifolds. I didn't think of looking at the number on the back of the manifold.

Thanks in advance.