Hennessey upgraded the Shelby GT350 with 808 horsepower and put it to the test on the dyno.

Hennessey has a reputation for making fast things even faster. Way faster. In keeping with that theme, the Texas tuner’s latest victim is the brand new Ford Mustang Shelby GT350. With 526 horsepower available from the pony car stock, Hennessey got to work on upping the insanity factor to 11.

The final result was 808 horsepower and 657 pound-feet of torque courtesy of an upgraded 2.9-litre supercharger. From a dead stop, it will hit 60 miles per hour (96 kilometres per hour) in just 3.3 seconds and conquer the quarter mile in just 10.8 seconds at 133 mph (214 km/h).

Aside from the massive new supercharger, Hennessey made sure to tack on some forged steel connecting rods, a carbon fibre high-flow air induction system, upgraded fuel injectors, an upgraded fuel pump, and carbon fibre coilpack covers for good measure. 

As far as aesthetics are concerned, not much has been done — not that it needs to be. Some exterior badging to denote the new supercharger, lightweight forged wheels, and floor mats are all that differentiate the looks of this Hennessy-tuned Shelby Mustang from your run-of-the-mill factory version.

Only 50 examples of this powerful Mustang will be built, but before they are, the Hennessey crew made sure to put its upgraded performance to the test on the dyno. Watch the video and see just how insane this new Mustang is for yourself.

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