If you need a loud pipe in order to survive in traffic I guess we won't need to worry about you for long. My DR650 has a Supertrapp can on it (along with the required new air filter and carb re-jetting) so it is definately louder than stock but given the sound-proofing on most modern cars now-a-days and the volume of the stereos in most of them, having a pipe loud-enough to make a difference is really only going to give more people yet another excuse to dislike motorcyclists. In the 13 years I've been riding the DR, I have been cut-off by a car once but since I know how to ride in traffic it was no big deal. If you really want to survive in traffic, take a course in defensive riding and keep your eyes open. After you actually learn to ride in traffic, then you can start looking at louder pipes, for performance of course. Randy wow! that's friggin amazing. in the past year of riding my dr i've been cut off numerous times. including one jacka$$ that proceeded to make a right turn right around me at an intersection while i was waiting for traffic so i could make the right turn. he just pulled up right alongside my left side and turned right in front of me like i wasn't even there needless to say i gave him the old one finger salute.