Works like the e-Ram it appears. It sez you should only flip the switch at WOT though - will likely get driveability problems on part throttle. Someone try it.
I have seen these in person. Its merely a fan (much like the bilge blowers on ebay) that delivers 260cfm. Snake oil. Not like the E-Ram at all. No boost involved in this over priced air filter/fan combo.
Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST
Pre98 Zetec - Some Mods