I feel your pain man, just tighten your shit real good and put weatherstripping between all the panels, I mean ALL the panels, kills alot of it. get the kind that has tape on one side and felt on the other, it'll take a day to do, but it's worth it, like they said, tighten all bolts down, but even with that, dynomat extreme, and the weatherstripping, I still start the car and hear BBBBZZZZZZZZZZZZZ when my rpms drop to idle from the exhaust, dont know what to do on that, and yea, still have the telltale sunroof rattle. tia!