You should have no problem. My son's '90 LX passed inspection with an Off Road H-pipe. They didn't even look for cats. It also passed the sniffer with the O/R pipe. They visually check for cats where I go. Heads up though; there has recently been a lot of controversy in MA aroung the emissions testing equpiment. The car mechanics have been complaining that too many cars are passing inspection. They even took a car around to different places and got different readings, some passing, some failing. I'm not sure if they have tightened the system yet. I have a MAC H-pipe with cats and that passed in January.