The LS3 is a high performance engine that was introduced in the 2008 Chevrolet Corvette. It is an evolution of the LS2 engine and retains its 6.2L displacement. The LS3 produces 430 horsepower at 5,900 rpm and 424 lb-ft of torque at 4,600 rpm. Unlike the LS2, the LS3 features cylinder heads with improved airflow and larger intake and exhaust valves. These improvements help increase power while also improving fuel economy.