The top is made out of heavy die-cast aluminum and the bottom is made out of stamped steel. The top features the word "Cobra" on it. Ford Racing Aluminum Oval Air Cleaner with "Cobra" Script for 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972 and 1973 Mustangs with a V8 Engine and Four-Barrel Carburetor.