It's not hittng anything and its defiantly the muffler portion of the exhaust. I've heard of the insides coming loose and rattling?

Anyone have a remedy or another muffler that will clamp on in place of this one?

Thanks

 

Do you have the stock cat still in place? I just recently had this issue, the shield that is covering the cat broke loose, so you could move it all around. I just tacked it back on with a couple welds.

 

I don't have a cat and the rattle is coming from the muffler.