On the back of my klde intake manifold there are two extra ports. One of decent size that i assume is for my brake boost, roughly the same size as the one on my old k8 manifold. And than a huge port that i am not sure what it is. There isnt a port that size on my k8 manifold.
Here is a picture of the back of the manifold. The big port is on the left right behing the tb.