Or you could try this-
http://www.savagearchery.com/store.p...7f3f36006368d0
However, unless you add 20-30 fps to your bow, it is very unlikely you' ll even notice that big of a performance difference. In the past I compared an arrow shot at both 270 and 300 fps in a trajectory program I have, the difference in impact location at 30 yards, the upper end of most normal whitetail hunting distances, was only a few inches, very negligible. So for speed to make a big difference to you, you need to gain a bunch.
No product or tweaks to your current bow are gonna net you 20-30 fps, I' m afraid... What are you shooting now?