I believe my license plate rattles because my exhaust tip (part of my R*SR cat-back) hitting my rear bumper. Does anyone make something to stop this? Or could someone shed some light on how they solved the problem with some low-budget thing? Or could I possibly lower my exhaust in the back healthily (i.e. not scraping or dinging into other stuff)?

P.S. I put the R*SR cat-back in because I dont want people to think I just welded (or taped) on a ridiculous 5" tip. There is a cavalier in my town that has that.

 

put some rubber washers behind the license plate..screw the plate down tightly..the rubber should suck up the motion.