Kammala jumla mai zuwa: A cikin 1964, Reg Parnell Racing ya fara tsere da 25, ta amfani da injin BRM P56 V8, tare da iyakantaccen nasara. Chris Irwin ya sanya Reg Parnell Racing na 25/33 na 7th a tseren karshe na gasar zakarun duniya a
1967 Dutch Grand Prix, wurin da samfurin ya fara shekaru biyar da suka gabata.