Gee i wish new you wanted to get rid of a D&D pipe, i just put one on my STT, and frankly from what i read and sampled i expected it to be louder than what it is. it's just right for me. i'm sure you can find someone on this site that would gladly trade for a D&D. your header would be stock and does not need replaced with muffler. if you decide to keep your D&D you have several option's; have your bike tuned on a dyno, get ECMspy and learn how to do it yourself (that's my next move) some type of electronic jet kit like dobeck techlusion, or a race ECM. i'm sure i left a few options out.:p