Drag Specialties sells baffes for $15 pair, 1 3/4" that I put in my Drag Specialties Straight Pipes. The straight pipes were LOUD, but had that high pitched raspy sound, but when I put the baffles on, the high pitch harshness went away, with nice loud potato-potato sound still there.
Down side, no choice with regards to stock exhaust pipe/mufflers to retrofit in the event an inspection is mandated soon, and being in California, this is not a good thing. I can/t stress enough to keep your HD OEM pipes and mufflers...regulations and enforcement is coming, especially in this economy where the local, state and feds are all hungry for money.