In Pixar's Cars (2006), Lightning McQueen wants to win the Piston Cup.
The Piston Cup is the championship prize in the film's stock-car racing world. At the beginning, McQueen is a talented rookie focused on winning the title and securing a prestigious sponsorship. His ambition is clear when he becomes involved in a three-way tie after the final race of the season.
Because McQueen, Chick Hicks, and The King finish level on points, a tiebreaking race is arranged at the Los Angeles International Speedway. The event brings the characters together and eventually leads to McQueen's decision to help The King rather than sacrifice him for victory.
The Piston Cup is a fictional competition, although the film's racing presentation is strongly influenced by NASCAR. It should not be confused with the World Grand Prix, which is the international competition introduced in Cars 2. The Dinoco brand is a sponsor and prize-related company, not the name of this championship.