actually we have damn near the exact setup, and mine rattled at first, its cause of the way the hangers hold on to the muffler on the back -- i wouldn't really call his car a race car any more than almost any other crossfire its just got a few suspension mods.

keep in mind i have been around many track cars, and alot of VERY FAST 1/4 mile cars, and don't really no anyone who doesn't mind the rattle.