Mercedes-AMG Adds Third, “Pro” Model to GT Coupe Lineup

If you’re a fan of internal combustion, you are probably familiar with the recent drama at Mercedes surrounding its V-8. In an attempt to reduce emissions and bridge the gap to battery-electric performance, the performance arm of the brand, AMG, started swapping in four-cylinders for the bi-turbo V-8 we all know and love. That was around 2022 or so. Two years later, customers have voted with their dollars. No matter how much power the four-cylinder makes, they miss the V-8.

Good news has arrived for fans of Affalterbach’s hand-built bi-turbo V-8: Mercedes-AMG has fitted it in a third version of its flagship two-door, the GT Coupe. Called the “Pro,” this newest variant is the most powerful in the GT Coupe line.

The full name of the car is the 2025 Mercedes-AMG GT 63 Pro 4Matic+. Those who are fluent in Mercedes will recognize 4Matic+ as marketing shorthand for all-wheel-drive. Those have kept track of recent changes to the GT Coupe know that AWD indicates the recent change to SL architecture, as of the 2024 model year. Those underpinnings mean the car is larger and in many ways softer than its 2015–22 predecessor, which might be one reason why Mercedes has added this third model, for customers who want a V-8 coupe more oriented to track than to Autobahn.

With 603 hp and 627 lb-ft of torque , the Pro model is incrementally more powerful than the GT 63 (577 hp, 590 lb-ft), which is significantly gruntier than the GT 55 (469 hp, 516 lb-ft). All three, praise the good angels on the shoulders of the product planners, are powered by AMG’s V-8. There’s plenty of power left in this engine, as the previous-gen AMG Black Series and its 720-hp output indicates.

Though everyone is likely to lead discussions of the Pro with its horsepower figure, the most important changes to this car are to its aerodynamic package, its cooling system, and the brakes.

The new front fascia looks a bit different, and it is: The side intakes are bigger, and the carbon-fiber air deflectors are new. Like the fascia of the GT 63 and the GT 55, the one on the Pro includes the two sets of louvers that open, usually at high speeds, to sacrifice drag for increased cooling. The Pro comes standard with the AMG exterior carbon-fiber package ($5300), which specifies that the front splitter, side sill trim, rear diffuser, and rear wing are each made of carbon fiber. Not present on the other two cars is the AMG Aerodynamics Package, denoted by the fixed rear wing along with a set of fins on the underbody, at the height of the front and rear axles, to accelerate air as it passes below the car. In all, front lift is decreased by 66 pounds and downforce is increased by 33 pounds on the rear axle.

Mercedes-AMG has added a pair of radiators to the car, one in each of the front wheel arches. The radiators for the front and rear diffs, along with the one for the transfer case, are now cooled with electronically operated water pumps.

Other vanes on the underbody, together with brake cover plates, increase cooling to the brake system. The brake rotors are not only larger than those on the GT 63, by 1.1 inches, but they are made of a carbon-ceramic compound, rather than steel. (On the GT 63 and GT 55, the carbon-ceramics are a $8950 option.) The 21-inch wheels are a design that is also available on the GT 63 (AMG Performance Forged Split-Spoke), for $3300 if you want black or $4000 if you want gold. On the Pro, the wheels are finished in a different color: Himalaya Grey Matte.

Keen-eyed track enthusiasts will already have identified the tires as Michelin Pilot Sport Cup 2 Rs, essentially a DOT-legal track tire. They are available as a no-cost option, and among the GT Coupe range, exclusive to the Pro. If you don’t spec them, your GT 63 will be delivered on Michelin Pilot Sport 5 S rubber, the optional choice on the GT 55 and GT 63.

Inside, AMG treats you to its Performance Seats ($2500), which include integrated head restraints and enhanced lateral support. (Yes, they’re heated and cooled.) As with the GT 55 and 63, the Pro is available as a 2+2, thanks to that SL architecture, though it comes standard with just two chairs.

In short, the purpose of all these changes aren’t simply to make the Pro outgun its siblings on the track, but to outlast them. The 0–60 time and top speed of the Pro, in fact, are nearly identical to those of the GT 63, but the Pro ought to happily play all day long without worry for temperature or fade. And, if Mercedes takes one of these to the Nürburgring, it’s guaranteed to be faster.

It’s also guaranteed to be pricey. The base price of the GT 63 is $177,050 with destination, or $41K more than the “base” model. Given that the Pro carries options that would cost roughly $12,500 on a regular GT 63, we’re guesstimating a price well over $200,000, as high as $220,000.

The addition of the GT 63 Pro is a sign that Mercedes has realized, once again, the deep loyalty customers have to AMG’s V-8. Expect the company to cash in on that loyalty in the future—we wouldn’t be surprised if more powerful, more exclusive, and even pricier variants of the GT Coupe lie in the future.

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