Watch: Hennessey Shakedown its Twin Turbo C8 by Sebastien Bell April 3, 2020 Share Comments Even though many of us haven’t even seen a C8 on the road yet, Hennessey is already boosting power to ridiculous levels. Adding a pair of turbos to Corvette to make it a true beast. Although we’re used to four-figure power levels from the tuner, they’ve been a little more reasonable with this early attempt at tuning. In a previous video, the car put down nearly 650 hp at the wheels. And to see what that means to drivability, John Hennessey takes the Corvette around the team’s proving grounds and then out onto public roads to make sure that the extra grunt hasn’t hurt dallying ability too badly.