I just returned from Advance Auto with the dreaded P0420 check engine code. I know a pretty good mechanic, and he looked it over and said it is in fact the cat converter. He'll sell me an aftermarket one for like 350, but it won't turn the light off or pass inspection...goddamn California emissions standards. He recommends the stock converter for 1100 plus labor. I'd really like to avoid this 1250 dollar bath if I can...any suggestions, I'm pretty handy and resourceful.