Help me locate what is making this noise!

The exhaust is hanging low due to a exhaust system hanger ?
Well you see I cut my muffler off so it’s just open cat and there’s now only one exhaust hanger that’s holding up the exhaust and the heat probably warped the hanger and is now hanging a little low.
 
Never mind that noise was not the exhaust i think it got louder and it’s just getting really annoying at this point. I feel like it’s either right behind the firewall or right beneath my feet but I can’t find anything loose. Does anyone know what this may be