One of the first things taught in the Motorcycle Safety Foundation (MSF) course is that "Loud Pipes Save Lives" is a myth: cars can't hear your loud bike until it's too late, and defensive riding is infinitely more effective than relying on other drivers to hear you. The majority of motorcycle accidents are multi-vehicle. I have been riding for many years on everything from sport bikes, dual sport, all with stock exhaust, even no exhaust on an electric bike, and I have never been involved in an accident- defensive riding works. Loud pipes should have been made illegal decades ago.