I've got some of the Dunstall pipes on my old Daytona. While trying to decide on mufflers I took them off and put them on the America. They will fit, that was not a prob, however I just didn't think they looked right on the bike. Maybe if they were a longer muffler it would look good. Being so short, around 27" long, they just made it back to the peg hangers and they looked a little to megaphone-like to me. I love the way they sound, really awesome but not worth it in the "looks" department. Now if I could find a set another 10" long me thinks they would rock.
(the above only my opinion and not meant to insult anybody's sense of style, hehe)