Most of them are designed specifically for racing. Typical of its cars for the Formula 1 races that have powerful engines, wide tyres and low, wide body with a low center of gravity that was stable at high speed cornering. Ratio wings help the car to be high grip and effectively speeds up and stops, does a given trajectory from a competitor. For rally, for example, the maximum speed or race with a days duration, based on production cars, the changes in bodywork, suspension, engine and transmission to achieve maximum strength and reliability design, good protection to the pilots and extract maximum power from the engine.