when i remote started my car the other day i noticed a little rattle from the exaust like a piece of metal was bouncing around in there. after driving it for a while i got out and it was no longer there. any idea what it could be from?

I experienced this exact problem. When my jeep was cold, a rattle would emanate from the exhaust, directly underneath the center console. The rattle was annoying, embarrassing, and extremely evident. Finally, when the Jeep became warm, the rattle went away. A loose muffler baffle is the problem, and as soon as the Mopar/Corsa system was installed, the rattle was never heard again.

I had that problem when I installed my bb installed it was the bracketbythe tips it rattled on the bar right above it. if it sounds likeits coming fromthe back give that a look