Had my first dyno test done the other day...made 155.9/97ish stock and 165.7/99ish with the akro pipe (02 busa). I suppose thats about normal but the fuel/air mixture is what made the difference for me. The throttle response throughout the range is tons better. The tuner used the yosh box so w/a pc I suppose it even be better. Highly recommended for those who havent had their bike dynod.