Well, I had the exhaust on the bike for less than 24 hours before someone rear ended me and totaled the bike. I had a 2004 Buell xb12r. Anyway..the exhaust sounded great and looked great as well. Quiet at idle ad cruising but got LOUD when you rolled into it. With a noticeable gain in mid range and top end power. The only complaint I would have was the installation. A few of the brackets had to be modified. Specifically the exhaust outlet bracket. The hole was about 3/4" off and we had to drill another hole to fit. Took 5 minutes no big deal. Everything else was of high quality.