I have a 2009 Speedmaster and it sounded like a sewing machine with the stock mufflers. I took out the cats and then drilled a 3/4" hole through the 4 remaining chambers/ walls after i'd removed the last baffle and put a 1-1/2" stainless tube into a plate that i welded to the inside of the muffler. It's quite a bit louder than stock but it has a deep rumble sound that "barks" when you open it up. It also "woke " the bike up quite a bit. Had lots of compliments about the sound. i guess i should post its "bark" on you tube.
