This is an inner fender skirt for a 1941, 1942 or 1946 Chevrolet truck. This view is of the passenger's side panel, and this is the side that faces toward the front tire. The left side of this attaches to the mounting brackets on the firewall and the right side attaches to the frame for the radiator. (A part of one of the brackets is still visible on this piece in the hole on the lower left side.)