I know a guy I ride with at times with the big radius pipes on a Softail. It is noticeably quieter than the V&H slip ons I have on my Superglide. They do sound good to me.
Just keep in mind one thing..... When I was looking into them they required removal of the rear foot rest on a Dyna.
Just keep in mind one thing..... When I was looking into them they required removal of the rear foot rest on a Dyna.