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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.

big port is Intake header heater i believe...The smaller 2 are either EGR or IAC vaccume lines

if remember correctly i just plugged mine when i had the DE mani.

Cap it.