The Classes

The IMSA Continental Tire SportsCar Challenge features sports cars from worldwide manufacturers, straight from the showroom floor, raced side-by-side with only minor modifications. The Continental Tire Challenge has three different classes:

Classes

Grand Sport (GS) - As with all Continental Tire SportsCar Challenge cars, GS class cars are homologated to the global GT4 category specfication, constructed by each Manufacturer, and campaigned by independent teams. The GS class contains the top performing cars and include the Aston Martin Vantage V8 GT4, Audi R8 GT4, BMW M4 GT4, Chevy Camaro GS.R GT4, Mustang GT4, McLaren 570S GT4, Mercedes AMG GT4, and the Porsche Cayman Clubsport GT4 MR. The engines are tuned to produce between 400 and 500 horsepower and are capable of speeds in excess of 175 mph.

Touring Car (TCR) - The TCR class consists of homologated cars with engines tuned to produce between 300 and 350 horsepower and are capable of speeds in excess of 140 mph. Competition in this class is equalized by a variety of fuel-tank capacities, power and weight. For more information on TCR, click here.

Street Tuner (ST) - The ST class is also production based with much of the car using the same stock parts you would find on your passenger car.  This class is limited to four- and six-cylinder and rotary engines.  The ST class includes the Audi S3, BMW 128 and 325, Honda Civic Si,  Hyundai Genesis, Mazda MX-5, Nissan Altima and Porsche Boxster and Cayman. The engines are tuned to produce between 220 and 280 horsepower and are capable of speeds in excess of 150 mph.

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