It took awhile to start driving again (skiing accident), but got everything back together; Fabspeed sent back new cats. Apprently the first set were defective. Re-installed for the third time, easy but tedious and time consuming job. New exhaust gaskets, new exhaust clams; everything tight. Guess what? 4 or 5 CEL codes. Post cat rich bank 1, post cat lean bank 2, blah, blah, blah. If I didn't like the cats so much, I'd eff-it, back to stock. Obviously my car's ECU doesn't like 200 cell cats. I've ordered Softronic, they claim they can eliminate the CEL's. We will see!

 

Did you ever end up resolving this issue? I am having the same issue!!

 

I sent you a PM. Please let me know that codes that you are pulling from the vehicle. Thanks!