If you mean the spacer between the throttle body and upper intake manifold with coolant lines into each side, it recirculates exhaust gases. If you search the threads it's discussed about a million times cuz people always want to disconnect those lines (by the way, don't). Hope that's what you wanted to know. If not, my bad.
Correct. But Rio told me I don't need it since I have no EGR on my car. I will be changing to a Fox set-up and need the EGR plate to bolt the throttle bracket to. Any of you have any laying around?