When I lived in Palm Beach County, FL I used to have to have mine inspected and would always fail the first time. I would change the air filter (before I installed a K&N), get the oil changed (not that it helped, I just thought it would be a good time) and then it would pass.
It always made me nervous when they put that thing on the machine and drive it at 55MPH and used a 4 inch block "just in case" it came off, the block would keep it from going through the wall /forums/images/graemlins/blush.gif