Well first the two words "performance" and "louder" do not go together. If you make it louder the way you are asking for directions i.e. by removing the baffles. You will lose around 40% - 50% of your performance or power. These bikes rely on compression of the exhaust gasses for about half of the h.p. Try removing the muffler completely and see how it performs, and as per the owner's manual modifying the muffler or running without one, will void your warranty.