With Hennessey's Z700 upgrade package, the Corvette ZR1 becomes even better. The priciple behind the kit is improved performance through comprehensive upgrades both inside and out. Supercharger modifications include an increase in boost to 15 psi that help the car produce 705 hp @ 6,400 rpm. Furthermore the exhaust and intake tracts are new. To complete the package a new bodykit is available, as i...

Defined by its engine upgrade, the HPE550 Camaro is the first supercharged engine kit to be offered from Hennessey. Not only limited to power, Hennessey has also made a list of other upgrades which can comprehensively change almost every aspect of the Camaro.

The Hennessey SRT600 Turbo upgrade is available for all 2008 - 2009 Dodge Challenger SRT8 models, with either automatic and 6-speed transmissions.

SEALY, TX – Hennessey Performance Engineering (HPE), well known for their extreme performance sports cars and muscle cars, announces their Limited Edition 2010 HPE700 Camaro.

DALLAS, TEXAS (March 9, 2008) - Neiman Marcus Direct announced today that it is partnering with Hennessey Performance Engineering to introduce the 2008 Neiman Marcus Special Edition Hennessey Venom 700NM. The 2008 Special Edition Hennessey Venom will be featured in the spring Neiman Marcus Men's Catalog and will retail for $179.500.

John Hennessey has decided to take the next step and release his very own Viper-powered supercar. Landing somewhere between the Lotus Elise and Dodge Viper, the new Hennessey Venom GT could set the next performance benchmarks. It has the same engine as the Viper Venom which beats the Veyron, but mounts it in the center of the chassis.

Hennessey will upgrade almost any car, and his easy tweaks to the Ford GT up the power to 710 bhp and 690 Lb-Ft of torque.

October 29th, Las Vegas - American engineering has always been known for it's large and brutish engines and this Venom Viper 800 takes maximum advantage of this philosophy. It has an engine punched out to nearly ten liters and gets a 585 CID upgrade good for 810 bhp and 810 ft lbs of torque.

28 October, 2005, Houston, TX - Hennessey Performance Engineering will be featuring its first 2006 Venom 1000 Twin Turbo Viper SRT10 Coupe at the SEMA show in Las Vegas.

Results from the Car & Driver Supercar Challenge prove that John Hennessey's Vipers are the fastest tuned cars in America. Hennessey took the grand prize last November with a specially prepared, twin-turbo version of Dodge's Viper that won both the 0-150-0 and road course tests against the best that Kleemann, ReNNtech and Lingenfelter had to offer.

The 800TT viper conversion performed by Hennessey Motorsports yeilds one of fastest roadgoing supercars of our time. Twin Garett superchargers help to nearly double the the power of a standard spec GTS. An astonishing 830HP is realized with 725 of those horses making their way to the rear wheels.. A 2.4 second zero to sixty run was accomplished in the rain by an editor of Motor Trend. Although th...