I am getting ready to add a cold air kit to my GN, 9 inch K&N behind the drivers side air dam. Is this smog legal or do i need to reinstall the stock air box everytime i smog it?
Air cleaner modifications are "Items not of concern, as long as required emissions control devices remain intact and are not affected". The IAT sensor is basically in the same location as the factory unit, so I suspect it will not be a problem.