Needs both sides. These are the extensions that go under the fender extension on the door. They are also called foot wipes. The existing extensions have been badly beaten on by a previous owner and would take several hours to straighten. Not even sure they would turn out nice then. All models of 46-48 Olds interchange on these pieces. NOS to VG condition wanted. Please PM or call. Thanks for any offers or leads. 360-600-8559
Jerry