Hollow Clanky Sound

[AnarchyVA]

This hollow clanky sound just started Monday. You can hear it best when I switch over to the passenger side.

Any idea what it might be?

 

[AnarchyVA]

Seems like perhaps it is a bad cat......??

 

[olympic]

Could be a failed cat that has chunks of material rattling around in it. Better pull it off and inspect before the exhaust gets clogged or worse, a piece gets sucked back into the engine.