Its like 2hp if anything. They are not worth the money and the potential cooling or charging issues. Like... you are not going to gain anything power wise that is going to do anything. If you are getting beat by someone at the track putting on a set of pullies is not going to put your car over the edge or something.
Now if you are going for looks... pull your stock pullies off and send them out to get blasted and coated.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.