American performance house founded 1991 by John Hennessey. Famous for Hennessey Venom GT and Venom F5 hypercars, and extreme tuning of various platforms.
Hennessey Performance Engineering is an American performance house founded in 1991 by John Hennessey, based in Sealy, Texas. The company specializes in extreme tuning of various platforms including Ford Mustang, Chevrolet Corvette, Dodge Hellcat, Cadillac CTS-V, and various other muscle cars. Hennessey has also produced its own supercars: the Venom GT (2010-2017) and the Venom F5 (2017+).
Hennessey-tuned production cars typically achieve dramatic power increases. The Hennessey Mustang GT (HPE800 package) makes 800+ horsepower. The Hennessey Hellcat HPE1200 makes 1,200 horsepower. The Hennessey Corvette Z06 (HPE1200) and various other extreme tuner builds push standard production cars well beyond their factory capabilities. The work is often expensive: typical Hennessey tuning packages run $30,000-$80,000+ on top of the base vehicle.
The Hennessey Venom GT (2010-2017) was the company first attempt at a complete supercar. Based on a Lotus Exige chassis with Hennessey-tuned LS V8 making 1,244 horsepower, the Venom GT achieved 270 mph in test runs (in 2014, an unverified 270.49 mph claim). Production was limited to 16 cars. The Hennessey Venom F5 (2017+) is the successor: a clean-sheet hypercar design with 1,800+ horsepower targeting top speed records and limited production (approximately 24 cars planned).