Kammala jumla mai zuwa: Bruce McLaren ya fara wasan farko na Grand Prix a tseren Monaco na 1966 (na kungiyoyin Formula One na yanzu Ferrari ne kawai ya girmi). Gasarsa ta ƙare bayan zagaye tara saboda kwararar mai na ƙarshe. Motar ita ce M2B wanda Robin Herd ya tsara, amma shirin ya kasance yana da matsala ta hanyar zaɓin injin mara kyau: an yi amfani da injin lita 3.0 na injin Indianapolis 500 na Ford da kuma Serenissima V8, wanda ya zira kwallaye na farko na tawagar a gasar.
Birtaniya, amma dukansu biyu ba su da ƙarfi kuma ba za a iya dogara da su ba. Don Bruce ya yanke shawarar amfani da injin V12 na British Racing Motors (BRM), amma saboda jinkiri tare da injin, an tilasta shi da farko ya yi amfani da motar Formula Two da aka canza da ake kira M4B wanda BRM V8 mai karfin 2.1-litta ke amfani da shi, daga baya ya gina irin wannan amma karamin babba mota da ake kira M5A don V12. Babu motar da ta kawo babban nasara, mafi kyawun sakamako shine na huɗu a Monaco.