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Although the hot and new 2020 Ford Mustang Shelby GT500 isn’t available at dealers just yet, that didn’t stop famous Texas tuning firm Hennessey from sharing its soon-to-be-available upgrades for the flagship muscle car. That is, if the GT500’s supercharged V8, the most powerful stock supercharged eight-cylinder ever fitted to a factory production car with 760 horsepower and 625 pound-feet of twist, just isn’t enough for you right out of the box.
Hennessey released details on its available upgrade options, which are tiered into three packages: the base Venom 850 kit, the midrange Venom 1000, and the flagship Venom 1200. The numbers correspond to the horsepower rating of each package.
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Beginning with the base Venom 850 kit, the package includes improved breathers for the GT500’s V8 in the form of stainless-steel long tube exhaust headers, high-flow catalytic converters, a CNC-ported in-house supercharger with a pulley and belt upgrade, and a high-flow air intake system. Despite the seemingly modest “bolt-ons,” the result is a bump to 850 hp and 725 pound-feet, using 93 octane from Shell V-Power, as per Hennessey’s own testing.
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Opt for the midrange Venom 1000 kit, and as indicated, you’ll get 1,000hp on the same fuel and 850 pound-feet thanks to a more intense 3.0-liter supercharger upgrade, a beefed-up intercooler, fuel system upgrades, and the same breathers as the Venom 850 package.
And the flagship Venom 1200 kit provides enough power to slow the Earth’s rotation: a whopping 1,200 hp and 1,000 pound-feet of twist on E85 or 109 octane racing fuel. With this kit, the folks at Hennessey swap out the supercharger arrangement for a twin-turbo setup with an uprated intercooler, fuel system, upgraded pistons and connecting rods, strengthened transmission, and upgraded intake and exhaust breathers.
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All Venom packages come with serial-numbered dash and engine compartment plaques signed by John Hennessey himself along with professional installation, a thorough test drive consisting of 150 miles to confirm optimal function, and a limited one-year/12,000-mile warranty.