Hey I am trying to get some others together for a group buy (I am not the one running it but I am participating, and have been wanting this thing for a couple years). I figured lots of people in this subfourm may be interested so hopefully the mods can leave it for a few days.
Basically its a 10mm spacer that sits between the intake manifold and the head. It stops heat from flowing from the head to the intake manifold, reducing intake temps. One guy tested the surface of his intake manifold before and after and found a 60 degree drop!
The kit is $150 shipped and includes longer studs, 2 new gaskets, and some washers.
For more info you can check this thread:
http://www.r3vlimited.com/board/showthread.php?t=191828&page=6If you don't have an account there I can add your name to the list (I am e304me)