The D3ZZ2162A 1971-74 Ford Mustang Shelby Reservoir Filler Cap is a new old stock (NOS) OEM part made by Ford. This cap is specifically designed for the Ford Mustang Shelby models from 1971 to 1974. It is a genuine replacement part that ensures a perfect fit and function for your vehicle's reservoir system. Whether you are looking to replace a worn-out cap or to restore your classic Mustang, this NOS OEM part is the ideal choice for you.