Those who believe too much is just barely enough will love the Mercedes-AMG GT 63 PRO, a road-legal track day special set to arrive in the U.S. in 2025.

AMG’s GT 63 is offered in several specifications, including the GT 63 S E hybrid unveiled earlier this year. For those who want buy track time to explore ultimate potential of a car, or those like me who have easy access to 2-lane roads with pavement as smooth and flawless as a billiard table, there is now the Mercedes-AMG GT 63 PRO 4MATIC+, a roadworthy and road-legal car calibrated and designed for on-track performance.

Starting with the heart of the matter, the GT 63 PRO’s hand-built AMG 4.0-liter V8 biturbo delivers 603 horsepower, 26 more than in the AMG GT 63. Peak power is available between 5500 and 6500 rpm. Torque increases by 37 lb.-ft. for a total of 627, available in a fat and happy range of the engine, from 2350 to 5000 rpm, with a smooth handoff to the horsepower peak. This engine should prove a capable and accommodating partner for any sort of performance driving, on road or track. This engine should be remarkably easy to exploit, never wanting for power, never wanting for torquey oomph.

From a standing start, AMG GT 63 PRO reaches 124 mph (200 kph) in 10.9 seconds. Such standing starts are not the prime measurable for a track car, but that number speaks to a potent engine. In that favorite American measurable, the car should deliver a quarter mile in the high 10-second range. Equally impressive is a standing start sprint to 60 mph of 3.1 seconds. Top speed is 197 mph.

To gain power from an existing engine, usually one spools up the turbo pressure, and squirts more fuel. More power invariably means more heat. No doubt AMG protected for these potent versions of the 4-liter V8 when designing the engine block and heads, which have considerable oil galleys and coolant passages. But they have significantly enhanced the cooling system. Two radiators are now positioned in the left and right front wheel arches to increase cooling efficiency and ultimately enhance overall vehicle performance on the racetrack. Stable temperatures when circulating a track are critical to engine life, and consistently delivering the promised power.

Track time stresses all systems. Braking systems are usually not worked too hard on the road, but track is different story. To aid brake cooling, there’s a new geometry to the underbody air vanes and revised brake cover plates that together optimize airflow to the brakes. A well-chilled brake is a happy brake.

Top-mounted radiators for the front and rear differentials are now cooled “actively” with electrically operated water pumps ensuring circulation of coolant to continuously dissipate heat via the top-mounted radiators. In other words, dedicated small (and one assumes not terribly heavy or complex) pumps will push large volumes of coolant through dedicated radiators to keep the differentials in their optimum range. The same engineering approach is used for the transfer case that sends power to the front wheels. Remember that AMG Performance 4MATIC+ means this is a fully variable all-wheel drive system.

AMG GT 63 PRO has a unique front fascia with additional carbon-fiber air deflectors around the enlarged side air intakes.

AMG’s active air control system, AIRPANEL, in the front fascia and the AMG Aerodynamics Package with fixed rear wing are standard. Underneath, the “bellypan” manages flow characteristics under the car. Aerodynamic lift on the front axle is reduced by over 66 lbs. for even greater handling stability.

The AMG GT 63 PRO features additional air deflectors on the underbody, similar to those on the Mercedes-AMG ONE hypercar. Located at the height of the front and rear axles, these fins accelerate airflow over the underbody, pushing the car downward, firmly planting it to the pavement at high speeds. All aerodynamic measures are coordinated and interact with the fixed rear wing concept, which increases downforce on the rear axle by approximately 33 lbs. All that said, the car wings, winglets, deflectors and adjustable aero surfaces will suck the car down at high speeds and keep all four tires planted.

AMG GT 63 PRO wears carbon-ceramic high-performance composite brakes. Up front, 6- piston fixed calipers bite int 16.5-inch brake discs – the largest standard ceramic brake discs currently available from Mercedes-AMG. Out back, single-piston floating calipers. To keep the weight of these enormous brake discs contained, the backs of the carbon-ceramic discs are made of lightweight, high-strength titanium.

AMG ACTIVE RIDE CONTROL suspension with active roll stabilization, active rear axle steering, active aerodynamics and AMG Performance 4MATIC+ fully variable all- wheel drive further refine the driving experience.

Mercedes-AMG has grown its skill set. They have issued a hypercar, the AMG ONE, with technology directly transferred from Formula One. They have now engineered all aspects of a road car, starting with the new SL. Expect more technologically advanced and compelling AMG performance cars in the coming years. The party in Affalterbach is in full swing.