The Piston Cup is the main championship race series in Pixar’s Cars 3.
Lightning McQueen has built his career around competing for the Piston Cup. In Cars 3, his position is threatened by Jackson Storm and other next-generation racers, making the championship a symbol of both his sporting legacy and his uncertain future.
The Piston Cup is fictional, but its presentation draws on American stock-car racing, including sponsor-heavy liveries, oval tracks, pit crews, and championship standings. The series name is also a playful reference to the piston engines associated with automobiles.
The Piston Cup should not be confused with the World Grand Prix, which is the international competition at the center of Cars 2. Dinoco is a sponsor and racing brand in the Cars universe, not the name of the championship itself. The Cars 3 storyline later shifts attention from simply winning to deciding how McQueen can contribute to racing’s future.