A reproduction of the original upper fuel tank filler neck designed for use with 1957 Chevrolet Bel Air, 150, 210, and Del Ray, 2 & 4 door convertible, hardtop, and sedan models. Each filler neck is manufactured in quality stamped steel featuring a deep zinc plating for premium rust and corrosion prevention. If your fuel cap is loose when installed, the fuel tank filler neck could be bent, or worn out. This can cause issues with fuel leaking or evaporating. Includes the filler neck to tank rubber O-ring. Note: Note for use on station wagons or Nomad models.