 With Chevrolet's 2014 Corvette model change, Callaway Competition began development of the C7 GT3-R racecar.The new car made its debut at the Hockenheimring, in Germany, in October 2015.Chevrolet Division of General Motors granted exclusive authorization to construct, homologate and sell Corvette C7 GT3-R's worldwide, except North America where Cadillac Racing campaigned in GT3.