The front air deflector is made of two pieces that were resistance-welded together at the factory. The flat piece serves as an air-dam, forcing the air thru the radiator. The top curved piece provides a barrier between the fender front grille opening and the wheel-well, just behind the headlight. It also prevents rain water splashed by the front tire from spilling out over the parking light housing. That piece is notorious for rusting through because mud will collect in the little space between the fender and top piece. I have repaired those much worse than yours, but if you are not into mig welding and metalworking, you might be able to find a better replacement somewhere in the marketplace. To my knowledge, reproductions are not available. Once upon a time, the entire panel was offered as a fiberglass replacement by one of the fiberglass auto body replacement part suppliers, but that was a long time ago.