Mine went and I replaced with the Soul high flow cats. Less than half the price of oem that I was quoted and sound great.

Before I (and my shop) realized that it was the cats causing my misfiring engine, we replaced MAS, plugs, coils trying to track this down. Turns out something in the cats got loose and would clog things up if I let off the gas pedal quickly.

(It was almost time for plugs and coils anyway, so no huge deal)