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The Continental Tire SportsCar Challenge features sports cars from manufacturers worldwide, straight from the showroom floor, racing side-by-side with only minor modifications. The two classes competing simultaneously on track are Grand Sport (GS) and Street Tuner (ST).

Grand Sport (GS) - As with all Continental Tire SportsCar Challenge cars, GS class cars start out as stock, production model cars that race with minor modifications only. The GS class contains the top performing cars and include the Aston Martin Vantage, BMW M3, Chevy Camaro GS.R, Ford Shelby GT350R-C, Ford Mustang Boss 302 R, Nissan 370Z, Porsche 911 and Subaru WRX-STI. The engines are tuned to produce between 350 and 405 horsepower and are cabable of speeds in excess of 160 mph.

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 170 and 240 horsepower and are capable of speeds in excess of 135 mph.

The IMSA Continental Tire SportsCar Challenge
The JDC Miller MotorSports BMW 228i Race Car

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BMW
Stock production model based
2.0-liter BMW TwinPower Turbo inline 4-cylinder
Up to 135 mph +
0-60 5.5 sec.
8-speed Sport Automatic transmission, Steering wheel-mounted paddles
Extensive aluminum componentry, DFive-link fully independent rear suspension in lightweight steel
Integrated steel roll cage, FIA headrest/side head restraint, compatible with HANS device.
Length: 174.5", Width: 69.8", Height: 55.8 mm, Weight: 3295 lbs.
ventilated discs, Anti-lock braking system (ABS)
Front Front : 17 x 7.0; and 205/50
Adjustable shocks, sway bars, brake bias
Motec system with steering wheel display

Conti Championship Schedule
IMSA Prototype Challenge Series Info
IMSA WeatherTech Championship Series Info