Hennessey’s HPE850 upgrade pack for the GT350R & GT350R sounds amazing, but it is very fast.

Ford’s Shelby GT350 Mustang has already become a legend. Its incredible performance is matched only by its 5.2-liter Voodoo engine, which thanks to its flat-plane crankshaft, makes it an ear-splittingly amazing piece of machinery. Stock is not enough for everyone, regardless of how powerful the car may be right off the showroom floor.

We salute your efforts to create the Hennessey HPE850 , which may be the most stunning GT350 yet. In case you haven’t guessed, that number refers to the horsepower at the crank, thanks to the addition of a positive-displacement, 2.9 liter supercharger pushing 5-6 pounds of boost.

The Hennessey website has all the specifications, including a dyno that shows nearly 790 horsepower at the rear wheels. This car is a Demon Hunter if we have ever seen one. It has an exceptional chassis. This is a good comparison. After Hennessey’s modifications to the HPE850 GT350R , it sounds almost like the devil.

The package includes more than the supercharger. Hennessey modifies the induction and exhaust systems to improve the engine’s breathing and installs a modified fuel supply to the beast. Each Hennessey HPE850 GT350 comes with a serialized tuning kit and a two-year warranty.

The 0-60 time is just 3.3 seconds. The quarter mile takes just 10.8 seconds at 133 mph. That’s some serious, peel-your-eyeballs-off-the-back-window performance. It is amazing to be able buy a hot rod in a complete package, professionally built, in ten seconds. Even more remarkable is the warranty. Although the Hennessey website does not list prices, it is possible to inquire …” about them.