I heard them at my local dealer next to several other slip ons. They sounded great, with a deep low rumble. They were different enough that I changed what I was going with to those on my new bike. When I first heard of them I couldn't get Victory/Ness out of my mind. After hearing them I thought, hey, they're on my truck, so why not my bike. They had a deep rumble that sounded great on the showroom! I hope they sound as good or better on the road.