John Hennessey, our founder and CEO, made a name for himself in the early 1990s with race-winning vehicle modifications that gained global fame. Pursuing his true passion, John left his small environmental business and aimed his entrepreneurial skills at modifying, tuning, and enhancing high-performance cars. Today, the company operates Hennessey® Performance Engineering (HPE), Hennessey® Special Vehicles (HSV), and the world-famous Tuner School® where future vehicle engineers and tuners learn the trade. 

Hennessey® has modified more than 15,000 cars and trucks since opening in 1991.