sh*t...sorry...didnt know that...I always thought the sims where to fool the pcm in thinking there was a cat to turn the cel off....I didnt pass in my old evo mr with a test pipe...I had o2 sims and no cel .....
I know here in maryland if any light is on in your dash they will not even test it. even a factory light for oil change
My truck never once threw a code, maybe I was just lucky. I hope the Vdub passes with the test pipe on it when the time comes. I'll let you know.