Hennessey Performance Engineering is an American tuning house specializing in modifying sports and super cars from several brands like Ferrari, Porsche, McLaren, Chevrolet, Dodge, Audi, MercedesBenz, Toyota, Nissan, Mustang, Cadillac, Lotus, Jeep, Ford, BMW, Bentley, Chrysler, GMC, Lincoln and Lexus. Established in 1991 by John Hennessey, their main facility is located west of Houston, Texas. This firm focuses on 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.
Hennessy has a BBB rating of A+ as of 29 July 2015. Hennessey has been the subject of numerous lawsuits and Better Business Bureau complaints throughout the years, with many BBB complaints left unresolved and, according to court records, many judgements entered against Hennessey. According to Car and Driver, a 2002 Dun & Bradstreet search had also turned up significant concern about Hennessey's financial footing.
In 2008, the Tuner School was founded by the company. It is a private institution dedicated to teach and train high performance vehicle tuner technicians. It is located at Lonestar Motorsports Park, near the Hennessey Performance headquarters. All instructors at this education facility are actual performance tuning mechanics.