Kammala jumla mai zuwa: Twin Cam ya yi bayyanar da yawa a cikin Formula 1 Cosworth Mk.XVI tsari a lokacin da tsari ya gudana daga 1961-65. Farkon bayyanarta ya kasance a 1963 Grand Prix na Afirka ta Kudu a cikin Brabham BT6 wanda David Prophet ya tuka. Injin ya bayyana a motoci biyu a cikin
1964 Birtaniya Grand Prix, daya daga cikin Gerard Racing Cooper T73 wanda John Taylor ya jagoranci da kuma John Willment Automobiles Brabham BT10. Abinda aka rubuta shi ne wuri na tara a shekarar 1965 na Afirka ta Kudu, kuma a cikin Willment Brabham.