Original used oil filler cap adapter for any 1967 Mercury Cougar or 1965-67 Ford Mustang. This is for use with the open emissions, push on oil cap. This adapter allows for slip-on type oil caps to be used on valve covers with the twist-on style cap hole. 1.25" O.D. Will most definitely need a new gasket. These will ship "as found" or fresh from our wrecking yard. Photo is most cases will show a cleaned part for glamour photography shots. Also have reproduction version.
Ford part number C5AZ-6A868-A.