This hood is the original design Shelby GT350 look for the Ford Mustang 1965-66. The hood is fiberglass, inner and outer with billet 6061 T6 laminated in the inner. The aluminum has been drilled and tapped for mounting all the stock hardware. We recommend NO HOOD SPRINGS OF ANY KIND… Use a prop rod. We also strongly advice hood pins. It is too easy to not latch the hood EVERY time and have the hood blow up and crash into the windshield. Play safe, use hood pins.