Originally Posted by MrMoPar

Don't waste your time. Unless you ran over something, then that cat has serious issues. Corrosion, fatigue, plugged substrate, back pressure splitting case, none are good, and none warrant fixing. Just by chance, check to see if emissions warranty is still valid. It might be, then dealer has to replace. If not, take that $400 (insane price), and get a good quality replacement on both sides.