The OEM 1966-1967 Ford Mustang Radiator Fan Spacer 289 W/Air is a vintage part manufactured by Ford in the United States. This specific spacer has a length of 1-7/8 inches and is designed for use with a 289 engine and air conditioning system. The part numbers C60Z-8546-B and C60E-8546-B are used interchangeably, making it a compatible and authentic replacement for your classic Mustang vehicle.