This a screw on type radiator cap with the billet portion mounted on it. This is not a cover but an actual radiator cap for a mustang. I had it on my 1998 but im pretty sure this fits 1994 to 2004 mustangs.
Asking $30
Shipping is on you or you can pick it up.
http://i203.photobucket.com/albums/a...psflgrdfw8.jpg
http://i203.photobucket.com/albums/a...psiyrra89r.jpg