A total of 26 cars are set to compete in the final GT4 America weekend of the season at the Indianapolis Motor Speedway.
One of the main storylines is the three-way fight for the Pro-Am title, which will be decided on Sunday.
Random Vandals Racing's Kenton Koch and Kevin Boehm are close to securing the Silver class title, holding a 49-point advantage over RAFA Racing's Gresham Wagner and Tyler Gonzalez.
They need to only start Saturday's first 60-minute race to take the Silver class title.
Author's summary: GT4 America season finale at Indianapolis Motor Speedway.