if they do a sniffer test you'll fail for sure. if they look you will fail, being mass is worse then NJ, here they drive over a camera, but dont really look at much. gas cap, obd2 scan, and look for the cat, and out the door you go.

it would be best to have the code tuned out, that way it wont show at all. those eliminators sometimes dont work with a hi flow cat.