Hennessey has big plans for the upcoming Ford Shelby Mustang GT500 which includes a twin-turbo upgrade and 1,200 horsepower.

Just one look at the Ford Mustang GT500 and we knew that Hennessey would have big plans for the powerful pony car. That was confirmed earlier this month when Hennessey released a video where the team got their first look at the GT500. You can practically see the gears turning in their horsepower-addled brains.

We didn’t need to wait long for Hennessey to reveal those plans, which we can now peruse on their official website. As is usually the case, Hennessey plans to offer three upgrade packages for the GT500, and in keeping with previous naming conventions, each package has a number that denotes the amount of power the upgrade generates.

The only difference is that the car is now called the Venom, a nod to Hennessey’s supercar program and the Shelby Cobra logo.

At the bottom we have the Venom 850 generating 850 horsepower and 725 lb-ft of torque. That’s a significant boost over the stock GT500’s 760 hp. Getting to 85 horses involves new stainless steel long tube headers for the car's 5.2-L supercharged V8, as well as high-flow catalytic converter upgrade and supercharger tweaks involving a pulley and billet upgrade and machine porting.

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Next is the Venom 1000, with 1,000 horsepower and 850 lb-ft of torque. Now Hennessey needs to toss the old supercharger and install a larger 3.0-L unit, along with a new intercooler, fuel pumps, and a transmission upgrade along with all the previous upgrades from the Venom 850.

Hennessey Venom Mustang
via Hennessey

When it comes to the Venom 1200, the supercharge just won't cut it. To make 1,200 horsepower and 1,000 lb-ft of torque Hennessey plans to give the GT500 a twin-turbo system along with upgraded pistons and rods along with all previous upgrades.

As usual, all Hennessey packages come with embroidered headrests, badges, plaques, and serial numbers. The Venom 850 gets a 3-year or 36,000-mile warranty, while the other two just get 1-year or 12,000-mile warranties. Pricing and availability aren’t yet available, but we expect to see them arrive once the actual GT500 does.

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