The car is powered by a 3,496 cc (3.5 L; 213.3 cu in) Twin-turbocharged Ford EcoBoost V6 engine generating a power output of 647 hp (482 kW; 656 PS) and 550 lb⋅ft (746 N⋅m) of torque. The engine shares many components with the F-150's 3.5 L V6 engine including the cylinder heads, block and dual fuel system. Notable differences include larger turbochargers, an aluminum intake manifold, a custom dry sump lubrication system, unique camshafts and higher strength rotating and timing drive components.
 
According to Ford, "the GT will exhibit one of the best power-to-weight ratios of any production car," courtesy of its lightweight carbon fiber construction. Underpinning the GT is a carbon fiber monocoque bolted to aluminum front and rear subframes covered in carbon fiber body panels. The car also has a race inspired pushrod suspension system, active aerodynamics, and dihedral (butterfly) doors. The windshield of the vehicle is made of Gorilla Glass manufactured by Corning, which is also used for manufacturing smartphone screens. The Gorilla Glass is used to reduce the weight of the vehicle by allowing for a thinner windscreen with the same strength as a normal glass windscreen. The GT employs a four-stage external dry sump oil pump and has an oil capacity of 15.3 US quarts (14.5 L).