along with all major components to ensure the cars are technically identical and of equal performance. The tyres are a standard road radial which is specified to the series, and is run in both wet and dry.

The races last mostly between three and six hour endurance races, split between a team of two or more drivers. There are Fun Cup national series competed in the UK, Belgium, France, Spain, Italy, Germany and the Canary Islands, all of which combine in the 25 Hours at the Circuit de Spa-Francorchamps.