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2021 Super GT Sporting Regulation Updates

Limited in-season development for GT300 and GT300MC vehicles, plus clerical changes for 2021

The GT Association (GTA) ratified a handful of updates to the Super GT Sporting Regulations in February, that will take effect from the 2021 season.

The first two are clerical updates, including a new name for the series’ weight handicap system, which will henceforth be known as “Success Weight” (SW, for short).

There is no change to the Success Weight formula in either GT500, where teams will accrue 2 kilograms of Success Weight per championship point scored in the first six races – or in GT300, where teams will accrue 3 kg of Success Weight per point (up to the 100kg limit).

As reported earlier, the “JAF-” prefix has been dropped from the GT300 and GT300 Mother Chassis (GT300MC) vehicles, including the Toyota GR Supra, the Subaru BRZ, Toyota Prius, and the Mother Chassis Toyota 86 and Lotus Evora.

There is also a significant change to the vehicle regulations for GT300 and GT300MC vehicles, which will limit the amount of in-season aero updates that can be introduced during the 2021 season. GT300 and GT300MC cars are allowed two updates to the front canard per season, and only one update to the rear wing. Combinations of old and new front canards and rear wings are still permitted. The front and rear diffusers, which are a common part on the GT300MC vehicles, cannot be changed during the season.

Finally, the split-group GT300 qualifying format, which was used in all eight rounds of the 2020 season and in select rounds in prior years, will be the standard Q1 format for 2021: The field of 29 cars will be divided into groups of 14 and 15, and the fastest eight cars from each group will advance to Q2.