I ran them for about 6 months on my bike. They were too quiet for me. They come with 1 3/4" baffles but Bub offers a larger baffle for them. Only problem is they were never in stock. I had them on order for a few months before I gave up. I also had one of the baffles come loose in the muffler which was easy to fix by using a set screw in it. They sounded OK but I heard a set of Bassanis on a guys bike and they were history. I did run them with V&H duals for a short while and the sound was a little better.Sojourner said:Does anyone have any experience or feedback on the BUB Sleeper slip-ons for FLHTs? I like their appearance, but what about their sound, quality, performance, etc.?