Picked up some smokers gasket, ever since I installed my S280 my thermal exhaust has been vibrating pretty bad at idle and worse when the ac is on. Looks like the rear resonator is vibrating on the frame. I loosed all the clamps and re adjusted. And it got even worse lol. I’m going to add that high temp foam to try to dampen some of the vibrations. And re adjust again. Hopefully It helps