Hennessey Performance, based in Sealy, Texas, packs in a lot of horses under their 30,000 sq. ft. facility, but it might not be the kind of horses you imagine.

We're talking about horsepower of course- Ford GTs, Vipers, Corvettes, Jeeps, Dodges, the list goes on- all with just a few more horses than they came with from the factory floor. Hennessey will take a factory car- not always what you'd call slow and bland- and give it heart surgery. This heart surgery is different-the replacement will pump out more more power in the same envelope, and it doesn't just stop there. Upgrades occur at many different levels- not just your engine. What's the point of having 1200hp if you can't control it or slow it down? Brakes, suspension, and much more- but as the old saying goes, you have to pay to play.

Hennessey has an extensive line up of vehicles they've built, boating up to 1250hp Cadillacs, 1500hp Vipers, 1200hp Camaros, 1200hp Nissans, 1200hp Corvettes, 1000hp Mustangs, and a Guinness World Record setting 0-300kph (186mph) Venom GT, of which, one was built and sold to Jay Leno. Perhaps their most impressive vehicle is one that must be ordered from Hennessey's chief himself- John Hennessey- which got his start into modifying cars back in 1991.

Since 1991, Hennessey has grown his business into a well respected leader in performance modifications. Perhaps John's biggest break came in 1997 when Motor Trend featured his custom modified Dodge Viper as the first Viper to hit an impressive 200mph around a track, coming in at 203mph. Then in 1999, with John seemingly convinced that more power could be extracted from the Viper, a twin turbo setup would see its debut. From there, John's thirst for power in a reliable and well finished package never stopped.

To this day, John remains a go to man at Hennessey, with his name now well respected in the automotive industry.