Grand Sport coupe Chevrolet Corvette Grand Sport coupe Chevrolet Corvette LS3 6.2L engine.The Corvette Grand Sport is available in both coupe and convertible body styles, with either a six-speed manual or six-speed automatic transmission. The LS3 6.2L engine is rated at 430 horsepower (321 kW) and 424 lb.-ft. of torque (575 Nm) with the standard exhaust system. An optional two-mode exhaust system
