Well, supposedly this supercharger adds 20 hp more than the M90 on the older styles... the MP90 (from what I think I know) uses the same pulley size and everything, but is the inner diameter the same so I can use old pulleys from my 2001?

There is a guy on ClubGP who has installed a Dial-Ur-Boost pully setup meant for a G8 car....apparently it works for him. Some say the G9 SC shaft is a different diameter than the G8, but I don't know the size of the G8 shaft. I guess you could measure the shaft size before you pull the G9 pulley....

Yeah, I'm hoping it works... I want more power so bad... I can't take it anymore... I had a 2001 that was faster than hell, and now back to 260hp... jeez, I just can't take it anymore!!!!!