Who makes the Summit "Air Gap"?

I bought one several months ago. No sooner than I unpackaged the manifold I promptly sent it back to Summit Racing because of the poor quality. The manifold is drilled to fit the Magnum Motor or the Small Block. Whatever holes you don't use, they provide you with plugs to seal those holes.
So, also, from appearance standpoint it wasn't that great. I went with the Edelbrock manifold. The quality and appearance was far superior.