Hey bro, she went from 5250 rpms to 5750 rpms max. The lift still feels roughly the same maybe little better but not much. I did notice the rooster tail was below the cowing about a foot to a foot and a half. I personally was hoping for better results. Also my tach started acting up. It would turn on and off; It would be working then just quit, then start back then quit. The volt gauge worked fine at all times.