This too, was requested, and as you would imagine I was all too happy to oblige You’re looking at a 1971 Mustang Mach 1 351 H.O. Ram Air!!! (Courtesy of Autowp.ru)
According to Wikipedia, one of the most recognizable features of the ’71-’73 Mustangs is the optional (standard on Boss 351) NACA (NASA) hood with dual scoops. Though available as a visual, non-functional item, they could be made fully functional on models ordered with the Ram Air option, which included vacuum controlled ‘flappers’ at each scoop, and a fiberglass under-hood ‘plenum’ that directed cool, outside air into the carburetor.
The ram-air option included a two-tone hood paint treatment in either ‘matte black’ or ‘argent’ (matte silver), coordinated to the color of the Mach 1 decals and striping. In addition, all Ram Air-equipped Mustangs of this generation came equipped with twist-style, chrome-plated hood lock pins.