THE EXORCIST Camaro ZL1, upgraded to 1000 HP by Hennessey Performance, is a highly modified version of the already impressive Camaro ZL1, designed to deliver even more power and performance. In this comparison video against the McLaren 600LT, the differences are noticeable. How does this champion of American muscle stack up when placed next to a modestly tuned supercar? THE EXORCIST Camaro ZL1 lined up against John Hennessey’s McLaren 600LT on the Pennzoil Proving Ground to see what happens.