So then what is happing is when you go to the inspection station they hook up your car to the scanner and tell you the cat failed? If so, you need to scan it yourself or find out exactly what cat. I would go out on a limb and say it is the bank 1 pre cat but I see you have headers. Are your MIL eliminators working correctly? Or is your main cat bad (this would only show up on a smog test not an OBDII scan). Get it scanned and let us know.
jeff
