Chevrolet today introduced the Camaro GT4.R – a new-for-2017 and fully race-ready variant of the sixth-generation Chevrolet Camaro.Built to global GT4 regulations, the Camaro GT4.R is eligible in the Pirelli World Challenge (GTS class) and IMSA's Continental Tire SportsCar Challenge (GS category), two of North America's top GT racing championships,...