Well as long as you have had the car registered for more then a year and are under 5,000 miles you should get the exempt. As for the state. odds are there going to rack the car to pull wheels to check for brake linneings and will probly take to make sure there arent any exhaust leaks and they might see the missing cat. then the tech might fail you for both. Try to take it somewhere where they dont really look over the cars…