Looks like a direct take-off of an HKS design from 3-4 years ago. Supposedly works very well in certain applications. For $1000 I'd expect it to change plugs for me between runs as well.
Ordering the same manifold Shep has wouldn't do you any good anyways. His was obviously thought out using his kind or airflow numbers and all that jazz. Except for Brent, I doubt if *anybody* else is pushing that kind of air.