I always know I can get an honest opinion here.

I know that pulleys are free in IT (except that the same type of belt is required) but I am curious if the claim that you can gain 12hp from changing pulleys is true and if it is true... how! below is a link for the specific example I am talking about.

Thanks,
Stephen

http://srmotorsports.com/RX8_Power_Pulleys.html