The freestylecorp.com undertail for the Honda F4i looks remarkably like the SuperSport HotbodiesRacing model. I would question the quality of these products. Before purchasing, I'd do some hefty research to try to find other customers who have experience with them. Their website is anything but professional. They even reference an @aol.com address as the main point of contact, using eBay as a primary distribution channel.
I'd be wary.