I had this kit installed on my car a couple weeks ago by @
moto-mike
I opted for the 90mm pulley (5mm smaller than stock) which runs ~10 psi. My car has an AT and the following mods: P&L catted EL header, Perrin overpipe, Perrin catted frontpipe, Perrin catback, Perrin drop-in filter. Along with the supercharger I had a Perrin oil cooler, Radium PCV side oil catch can and the moto-east flex fuel kit installed.
It made 270 whp on 93 octane pump gas (3rd gear pull) and 291 whp on E70 (4th gear pull).