The kit is the X-Charger for the Mustang 4.0L from Explorer Express (
http://explorerexpresscom.nationprotect.net/index.shtml )
Dave Vanek at EE has been working on developing this since last year. Dave has had YEARS of experience modding the 4.0L before Ford even thought of dropping it in the Mustang. It's just hitting the market now (isn't even on the website yet). I've been in contact with Dave most of this year, and my kit is one of the first couple out the door (S/N 005)
It uses an Eaton MP90 4th generation blower, and is incredibly complete (down to common items like tie wraps and loc-tite being in the kit). The manual is 43 pages, spiral bound so it lays flat while you work, and full of dozens of color illustrations. I can't say enough good things about the attention to detail from EE.
This is the kit that Afixer on the boards has been running since last spring (his car was one of the testing and development vehicles)