Engines: Piston engines, production block and cylinder head, annual production of at least 2,500 units. Four-stroke engine, maximum number of cylinders: four. Air restrictor Ø 26 mm. The use of magnesium and supercharging is banned.
Gearbox: Sequential 6-speed gearbox.
Capacity: Maximum 2,000 cc, bore and stroke are free.
Tyres: Exclusively KUMHO ECSTA, limited to 60 sets of tyres per season per team. Three sets of tyres per weekend per team. Two sets of wet-weather tyres per race weekend, but their use is allowed in the case of a Wet Race only. Tyres to be filled with environmental air or nitrogen; chemical or mechanical treatment is prohibited. Tyre dimensions: 180/550 R 13 front, 240/570 R 13 rear. Tyre heaters are not allowed.
Wheel rims: maximum width 11.5, maximum Ø 13.
Chassis: Stepped floor, crash boxes at the front and the rear Two roll-over structures. No change of chassis during an event. In the 2011 season, chassis from the 20052007 homologation era are also