McLaren cars totally dominated CanAm sports car racing with 56 wins, a considerable number of them with him behind the wheel, between 1967 and 1972 (and five constructors’ championships), and have won three Indianapolis 500 races, as well as the 24 Hours of Le Mans and 12 Hours of Sebring.
Aware of the new CanAm series in North America that ran under the new Group 7 classification, the new R381 would become a much more powerful and faster car in comparison to the previous model.
In 1973, Phil Founded Drysumpsystems Inc. manufacturing oiling systems adaptable to race cars such as NASCAR, CanAm, TransAm and Formula 5000.