While we're on emissions.......... If you have a 1996+ car that gets an OBD "scan" emissions test, but your car is a 2003+, around the time where some auto makers started going to a CAN BUS comunications system, your car will not communicate with the current emissions software if it uses a CAN system. If your car is CAN equipped you will get inspected for cats and get a twospeed idle test (tail pipe test)........... just FYI.