So I've put on a set a true duals on my 07 Streetglide. Had them on about 3 months and I'm having one problem, my left muffler doesn't seem to stay sealed. I've pulled it off scuffed the mating surface with a scotchbrite pad. Resealed it with the high temp copper silicone they recommend. It slid back about an inch or so. Called bub's warranty dept they said a new clamp would fix it. So put the new clamp on resealed and now its slid back about the same or a little more. Does anyone have any suggestions??