I did the same thing Friday, but I did it intentionaly. The stock exaust was WAY to quite, so I took it down to the muffler shop and told them to take off the muffler and replace it with stainless pipes. Now it sounds like it should. I love the way it is so raspy when you let off the throttle in any gear, it sounds mean. and it only cost $120. Now all I have to do is find a better air filter set up.