The stock GT500 measures at 760 horsepower (567 kW), and is already the most powerful factory-built, street-legal Mustang Ford has ever made, but Hennessey’s upgrades turn the Mustang into a whole new beast. With its Venom 1,200 package, the Texas tuners can take the Mustang to a whopping 1,200 hp (895 kW) with a twin-turbocharged V8.
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.
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.
They will also offer “lesser” packages called Venom 850 and Venom 1000 which produce, you guessed it, 850 hp and 1000 hp respectively.