More Horsepower! The stock 2007 to 2012 Shelby GT500 Mustangs came with an impressive 500 Horsepower and 480 lb/ft of Torque from factory, but after installing a Hellion Twin Turbo Kit you will be planting a tire shredding 550 to 1,200 Horsepower to the pavement (depending on custom tuning and fuel upgrades). Complete Kit. The Hellion Mustang Twin Turbo Kit comes with (2) 61mm Turbonetics Turbos, (2) Turbosmart Ultragate wastegate, handheld programmer with base tune installed, and all the required parts and hardware needed to upgrade your mild manner pony to a wild snarling beast.Compound Boost. This unique Twin Turbo system was engineered to work with or without a roots style supercharger. If installed with a roots style supercharger this system becomes a “compound boost” setup to produce even more power and torque.Retains A/C. The Hellion Turbocharger system is designed to retain the factory air conditioning, A/C lines, and accessories for complete driver comfort.Application. This Hellion Twin Turbo Kit is specifically designed for use on the 2007 to 2012 Shelby GT500 Mustangs equipped with the Supercharged 5.4L DOHC V-8 engine. Please Note: Hellion Supercharger Systems are built to order for our customers and accordingly, we require you to submit additional information about your vehicle using this form. Because of this there can be a 5 to 7 day lead time on orders once your information is received.