As I’m driving down the highway I suddenly hear a rattle and eventually my typical exhaust note sounds a little deeper than usual. After work I climbed under to take a look.
Pipe appears to have corroded shortly past what I believe is the catalytic converter (only one pipe, facing the back end of the Explorer). I would assume someone tried to cut it and gave up, but the irregular wear and corrosion has be perplexed. Any ideas as to what could have caused this?

Pipe appears to have corroded shortly past what I believe is the catalytic converter (only one pipe, facing the back end of the Explorer). I would assume someone tried to cut it and gave up, but the irregular wear and corrosion has be perplexed. Any ideas as to what could have caused this?
