JTR conversion, 383 with true dual 2 1/2's. The vibrations in my car are rediculous. It doesn't shake like it would with sold motor mounts, but it vibrates like crazy. The exhaust is really loud, which I will be toning down very soon, within the next few weeks, possibly today. Any how, has anyone else had this problem, what did you do to fix it. I have heard of people spraying the floorboards with areosole bed -iner, but I my case I think that would be useless. The engine runs fine, and like I said, the car doesn't Shake, per-say.