The Piston Cup is the fictional racing championship contested in Pixar’s original Cars film.
Lightning McQueen travels toward the Piston Cup finale after tying with veteran racers The King and Chick Hicks. The three-way race is scheduled at the Los Angeles International Speedway, but McQueen’s detour to Radiator Springs changes his priorities before the final event.
The Piston Cup is a fictionalized stock-car competition that gives the first film its racing framework. Its name echoes the mechanical piston while also functioning like a recognizable championship brand. Dinoco is a sponsor associated with the series, not the name of the championship itself, and the World Grand Prix belongs primarily to Cars 2.
The Piston Cup remains part of McQueen’s background in later films, although Cars 3 focuses on his struggle against technologically advanced racers. The term is therefore specific to the franchise’s racing world rather than a real-world motorsport title.