well I have failed 3 times, once was even with the new cat in, but I have not been back since my valve stems were done, I'm almost sure that was the problem, but I'm trying to wait and hear back from that assistance program. If eligible I can get up to $500 to help with repairs. Bad thing about that is that I've already gotten 2 tickets a week apart from expired tags.....even though I paid for my registration already back in June