I don't have any before data, bike runs awesome to me so I am happy with it. I'd like to see some other dyno sheets to compare, not coming up with much on this site though. What prompted me to try the Boosterplug over a Power Commander which I have used in countless bikes, was 1 the price, Boosterplug $160, Power Commander $445. There are no maps for the Power Commander and on top of that price I would need a Dyno tune to make one. The science behind the Boosterplug made sense to me and I read many reviews and saw dyno info on other bikes also. Just wanted to share my experience.