Tuhia he haere tonu mo tenei waahanga - I te tau 1964, ka tiimata te Reg Parnell Racing ki te whakataetae i te 25, ma te whakamahi i te miihini BRM P56 V8, me te angitu iti. I whakanohoia e Chris Irwin te Reg Parnell Racing 25/33 hybrid 7th i tana whakataetae Whakataetae o te Ao whakamutunga i te 1967 Dutch Grand Prix
, te whakaaturanga o te tauira o te tauira e rima tau ki muri.