Under the bonnet the Lexus GS F features a 5.0-litre V8 with both Otto and Atkinson cycles. Thus equipped the motor cranks out 348kW of power and 527Nm of torque.
By way of comparison the BMW M5 has a 4.4-litre twin turbocharged V8 with 423kW/680Nm on hand.
Power is sent to the rear wheels via an eight-speed automatic transmission and a torque vectoring differential. The tricky differential has three driver-selectable settings: standard, slalom and track.
Lexus' latest performance sedan rides on 19-inch alloy wheels clad in 255/35 rubber up front and 275/35 tyres at the rear. The GS F tips the scales at 1830 kilograms, but the brand has yet to offer up performance figures for the car.
Exterior changes to car include flared wheel arches, a revised aerodynamics kit and the F sub-brand's signature stacked exhaust pipes.
The GS F also debuts an updated front-end look for the GS with a thinner main and high beam light cluster underscored by an arrow-shaped wedge of LED driving lights.
The new GS F will be unveiled in full at the Detroit show next week. When the GS F goes on sale, it will complement the similarly powered, but smaller, RC F coupe which was launched last year.