I recently installed the center stand and had to remove the mufflers. While they were off, I could not resist - I had to start it up. It sounded like a pro-stocker on a drag strip. Now as a kid, I raced my car with staight headers only sometimes. But I wanted to ask the board if this would hurt the Busa motor. I wouldn't want to do it all the time, but it might be fun to pass a loud-piped Harley. His pipes would be whispering in comparison.