GT4 America - Round 12 & 13

The Pirelli GT4 America series brings Round 12 & 13 to Indianapolis Motor Speedway for the 2026 championship conclusion. This doubleheader race weekend takes place as part of the Indianapolis 8 Hour event, which is also a round of the Intercontinental GT Challenge. The gt4-america series presents competitive sprint racing across multiple driver classifications, featuring production-based sports cars from major manufacturers.

Race Format and Classes

Each race at Indianapolis Motor Speedway runs for 60 minutes. Teams field two drivers who share the car during each race. This format requires a mandatory pit stop for driver changes, which adds strategic elements to the competition. The series divides entries into three classes based on FIA driver ratings: Silver Cup, Pro-Am Cup, and Am Cup. Teams display their class through colored number panels on their cars. Silver Cup teams use silver panels, Pro-Am teams use black panels, and Am Cup teams use red panels.

Fans can watch qualifying sessions and races through live streams on the GTWorld YouTube channel and SRO Motorsports Twitch. FS1 will broadcast one-hour highlight packages from the weekend.

The Indianapolis Motor Speedway Road Course

The gt4-america cars compete on the Indianapolis Motor Speedway Road Course. This 2.439-mile circuit features 14 turns. The layout combines portions of the famous oval with a technical infield section. Drivers must balance speed with precision through the varied corner combinations. The track demands consistent rhythm and car control.

Manufacturers and Teams

The 2026 Pirelli GT4 America season features GT4 machinery from Aston Martin, Audi, BMW, Ford, McLaren, Mercedes-AMG, Porsche, and Toyota.

BMW Entries

Multiple teams campaign the BMW M4 GT4 (G82) platform. Rigid Speed Company, Flying Lizard Motorsports, Stephen Cameron Racing, ACI Motorsports, Auto Technic Racing, BimmerWorld, and Random Vandals Racing represent BMW at Round 12 & 13.

Ford Mustang GT4

The new-generation Ford Mustang GT4 returns with TechSport Racing fielding drivers Frankie Muniz and Tyler Stone. McCumbee McAleer Racing runs Zach Lee and Jenson Altzman. LAP also enters Ford machinery.

McLaren Artura GT4

Flying Lizard Motorsports, Blackdog Racing, and Advance Motorsports compete with the McLaren Artura GT4.

Mercedes-AMG GT4

Dome Motorsport and Off Leash Motorsports represent Mercedes-AMG in the series.

Porsche Cayman GT4

NOLASPORT, ACI Motorsports, and Kellymoss run multiple Porsche 718 Cayman GT4 RS Clubsport entries.

Toyota GR Supra GT4

Precision Racing LA fields Karl Forman and Ryan Eversley in the Toyota Gazoo Racing GR Supra GT4. RAFA Racing Team also campaigns Toyota machinery.

Technical Regulations

SRO Motorsports Group establishes the technical regulations for gt4-america. All cars must be based on production models with a minimum production quantity. This rule maintains a direct connection between race cars and their road versions. SRO controls aerodynamics, weight, suspension, and chassis modifications through specific parameters.

The Balance of Performance (BoP) system equalizes performance across different car models and manufacturers. This system promotes close competition between various brands. Pirelli serves as the official tire supplier for all competitors.

Series History

The GT4 America Series relaunched in 2019, building on SRO GT4 regulations first adopted in the Pirelli World Challenge "GTS" class in 2017. SRO Motorsports Group took over series management in May 2018. The championship has grown significantly since its 2020 inauguration. Indianapolis Motor Speedway has hosted motorsport events since 1909. The facility has welcomed the Indianapolis 500 and various modern sports car racing events. The GT4 America series consistently features Indianapolis Motor Speedway for its season conclusion.

Notable Features

Round 12 & 13 determines the final championship standings for the Pirelli GT4 America series. The Indianapolis Motor Speedway weekend offers open paddock access and fan zones. These areas allow close interaction with teams and cars. The global GT4 Manufacturer Ranking tracks points from the top two scoring entries of each manufacturer across international GT4 championships. This system connects regional GT4 series around the world.

Actor Frankie Muniz competes in the 2026 season, driving a Ford Mustang GT4 for TechSport Racing. The diverse grid of professional and amateur drivers creates competitive racing across all three class categories. This event promises close battles as teams and drivers compete for championship positions.