In Pixar’s Cars, the Piston Cup is the championship that Lightning McQueen enters.
The Piston Cup is the film’s fictional stock-car racing championship, and the season finale is especially important because McQueen, Chick Hicks, and veteran racer The King finish tied in points. The three-way finale sends them to a decisive race in California.
McQueen’s obsession with winning the cup drives the opening part of the story. He loses his transport truck, becomes separated from the highway, and ends up in Radiator Springs. The town’s residents teach him that racing success is not the only measure of a meaningful life.
The Piston Cup is a fictional counterpart to American stock-car racing, particularly NASCAR-style competition. It should not be confused with the Dinoco brand, which is a fictional sponsor appearing throughout the Cars universe. The championship name also returns in later films and related Cars media.