The Piston Cup is the race series central to Lightning McQueen’s career in Pixar’s Cars.
At the beginning of the film, McQueen is competing for the Piston Cup and is tied with veteran racer Strip Weathers and rival Chick Hicks. The championship’s final race is disrupted when McQueen causes a three-way tie, leading to a tiebreaker in California.
The Piston Cup is a fictional competition, but its presentation draws heavily from American stock-car racing. Its name and trophy are widely understood as a playful reference to real motorsport championships and engine terminology.
The Dinoco 400 is a race associated with the film’s racing world, while the Florida 500 becomes especially important in Cars 3. The World Grand Prix belongs to Cars 2, so it is not the series McQueen initially seeks to win.