Hennessey Performance Engineering is an American tuning house specializing in modifying sports and supercars from several brands. Established in 1991 by John Hennessey, their main facility is located west of Houston, Texas. This firm focuses on the mechanical component modification for creating high-powered cars. Besides performance automobiles, they also tune sport utility vehicles such as Ford Raptors and Jeep Cherokees. They also work on luxury cars like Bentleys and muscle cars like Dodge Charger and Challenger.