Chevrolet's 6th Gen Camaro ZL1 only gets better with more power! Hennessey is proud to offer warranty-guaranteed 850 and 1000 HP performance upgrades for your Camaro ZL1. Enough talk, we hope you enjoy this compilation of Camaro ZL1s receiving test drives at the Pennzoil Proving Ground following their HPE850 and THE EXORCIST upgrades.