Lightning McQueen competes in the Piston Cup race at the end of Pixar's Cars.
The film's climax is a three-way finale between Lightning McQueen, Chick Hicks, and The King, also known as Strip Weathers. The race determines the season's Piston Cup champion after the three drivers finish tied in points.
McQueen has the chance to win, but he stops near the finish line to help The King after Chick Hicks deliberately causes a crash. Chick crosses first, yet McQueen refuses to accept victory gained by abandoning a competitor. The crowd and sponsors react strongly to his sportsmanship.
The Piston Cup is a fictional championship created for the Cars universe. It is not the same event as the World Grand Prix, which is the international competition central to Cars 2. The Dinoco brand is a sponsor within the series, not the name of this final race.