Not so much louder just cleaner sound. I saw that Mat Mladin's team cut his can during AMA's about 4 in. He did it so the sound was closer to his ear so he could hear his shifts and when he was in a group of other riders he could listen to his shift points. The midrange power is slightly better and throttle responce is a little more crisp. It was easy to do and now all my friends have done it!