Fan spacer measuring 1-1/4 inches. Application includes 1969 Mercury Cougar and Ford Mustang with Boss 302 or 428 Super Cobra Jet engines. Additionally it was likely used on 1971 cars with 351-2V engines and standard cooling. Reference number YA-20, cross reference to D1OA-8546-AA spacer.
Ford part # C8YE-8546-A, Ford engineering number C8YZ-8546-A.