I admit, I have not seen or heard the BS Duals yet. They peaked my interest since I have BS Staggared on the Fatboy, so I am only guessing the duals will be similar. As for the sound on the Fatboy, yes they are about a 6-7 on a 10 scale for loud (1 being stock, 10 open drag pipes), I will regularly set off any number of car alarms :harhar: with the stock baffels in. The great thing- both the Stag and the Duals accept the "Quiet Baffels". I do not run them in the Fayboy yet (I really love the sound), but I have heard them on other bikes. They do make a big impact on the sound level- lower and quieter note. My wife rides the Fatboy now and we will likely put a set of the quiet baffels on order since she wants to tone it down a bit.
I would like the chance to see and hear the duals before buying, but that's not a requirement. They will be ordered with a set of quiet baffels to start with for the dresser. Only thing about the duals as they are set up right now- according to the tech line at V&H, you have to remove the heat shields to swap baffels on them. The BS Stags that 1st came out has the same issue, but they wized up after a year or so of production and moved the locking screw a bit to allow you to pull the baffels without pulling the heat shields. You'd like to think they would be smart enough to figure out it was a crappy idea on the other BS pipes, so why not introduce the new line without the same issue?!
Allen