Yeah, the trouble with the OEM cats is that they run more than a grand, from what I have found. I could try my luck with another aftermarket "high flow", but... I am definitely kicking myself for not keeping the old cat, but at the time I had no idea how pricey the OEM ones were and I did not anticipate needing to go back to it. Does anyone have any opinions on the O2 simulator from URD? Seems like if I am genuinely passing emissions and not having any performance issues, this would be a cost effective way to deal with the CEL.