[chris want]

hi i think you will find it is indeed derek bell in a porsche 956.it is a turbo if you listen when he changes gear you can hear the waste gates of the turbos.the film comes from a video called incar 956 where derek bell drives the porsche around some race tracks. silverstone,the old nurburgring,le mans,spa franchorchamps,brands hatch,fuji speedway,kyalami. hope this helps regards chris