[0311_lifer]

i think you should only use the motorcraft ford recommended air filter on your car. im not too sure about this so any one correct me if im wrong but ive heard that something about the k&n air filters on a crown vic will mess with your mass air sensor or something. k&n makes really neat oil filters though because you can use a socket to install it and take it out but im not sure if they are that great for crown vics either.