Currently on a Testarossa.
From 1973 to 1996, Ferrari used flat-twelve engines in various production models: the 1973-1976 Ferrari 365 GT/4 BB, the 1976-1981 Ferrari BB 512, the 1981-1984 Ferrari BB 512i, the 1984-1991 Ferrari Testarossa, the 1991-1994 Ferrari 512 TR and the 1994-1996 Ferrrari F512 M.