The modified ZR1 is wrung out by John Heinricy.
The Hennessey ZR700 is a spicy meatball based on the already delicious ZR1. Adding almost 70 horsepower, up to 705, will most certainly help you achieve an alright amount of speed. Who are we kidding, it's fast as hell.
Check out the vid below where John Heinricy tests it out and by the looks of it, it's quite the handful. But listen to that sound. Tasty.