Ok So i tinted my windows today, and afterwards went for a drive and had the windows up(not supposed to roll um down for few days after tint) but i noticed that when i stop something sounds like its rattling its either coming from the middle of the car or around the muffler, i also noticed that it didnt start till after the flowmaster was installed. i thought i had a loose exhaust hanger or something but havent been able to locate it. and it doesnt rattle at idle only when you put into drive or reverse and just barley hit the gas or just put it in gear and let it sit there it will start to rattle. Any Idea's On What I Might Look At? Its a 97 3.8 Stock Exhaust(Except Super 44 Flowmaster Muffler.)

 

your best bet would be get a friend and have him put it in gear while you go around and push on your exhaust, heat sheild, etc til you find out what it is