Indeed it is, and always has been, but I have no conscience where that is concerned. If they hand me a pass certificate, all is well
People on here bash out their cats all the time and still get a pass
Ahhh, sounds like a pain then. Is it a 911 or a Ferrari or something?
How old is the car? Older cars have a much more generous CO pass limit, so technically speaking, if it meets the target without a cat(s), it might still pass.
Or you could stick a cat on the end of the tailpipe just for test