John
Hennessey and his team have been hard at work assembling a tuning program for the Chevy Camaro ZL1, and the results are as follows. Dubbed the HPE650, the tuned ZL1 features a 6.2-liter supercharged V8 equipped with a cold air induction system, stainless-steel headers and an upgraded intercooler. Hennessey also added new pulleys and revised the ECU. As a result of these mods, as well as fitting a new camshaft and high flow cylinder heads, engine output has increased significantly.