My friend literally cut off his exhaust on his Busa. He cut both silencers and some of the pipe off and welded up a flange for both sides of the exhaust to exit under the right rearset. I argued with him for almost an hour that it is not good for the bike. He insists that lots of people with Busa's do it. I tend to disagree and I would think that he is at a high risk of burning some exhaust valves. The bike is incredibly loud. Probobally the loudest bike I have ever been around. I can't even ride next to him, and the sound isn't even a nice one. I can't imagine why someone would want to do this. Can anyone give me some feedback on this? I would like to show him what others think about the idea of this. I just don't want him to destroy his fairly new bike.