The first prototype receiving those modifications was code named “F3”, and was destroyed in the first crash test. A total of 37 prototypes and pre-production cars were used for testing and press activities. Most of these prototypes were dismantled and discarded, but several managed to survive. In 1985, Porsche’s head of development Helmut Bott earmarked 29 930 Turbo chassis to be turned into 959 prototypes for testing.