I have a set on my 06 Road King. They sound great and are mellow at low RPM's . When you whack the throttle though, they bark pretty good! Have a real nice tone to them and don't cost much in horsepower.
I havent heard them, I am in Australia and so far they aren't down here.
I purchased from USA with true duals.
Are they quieter than the normal crushers ?
Do you know if they can be softened down if necessary?
Not sure if they can be adjusted or not. Just got 'em. They are quiet enough and have a nice sound but, they do bark when you get on the throttle. Mine is a bigger motor(120r) so they may sound different on yours. I do know the sound is much mellower than the Rineharts I took off. The best thing about the configuration is the way the pipes run under the passenger foot pegs on both sides.