2010 chevrolet corvette grand sport equipped with 6.2-liter LS3 V8 remains, pumping out the same extremely capable 430 horsepower and 424 lb-ft or torque (436 horsepower and 428 lb-ft with the optional two-mode sport exhaust) and is easily manipulated to do your bidding through either a six-speed manual or six-speed automatic transmission.Gear ratios and final drives are those of the Z51 performance package. Unlike the Z06, model the Grand Sport will be available as a convertible and with an automatic transmission. The engine, however, remains the LS3 small block V-8 from a standard Corvette, with horsepower figures of 430 or 436, the latter when equipped with the optional 2-mode exhaust system. chevrolet car, car insurance, car rentals.