The AMG GT 63 Pro is the track-focused C192. The V8 is turned up to 603 hp (612 PS) and 627 lb-ft, 26 hp and 37 lb-ft above the GT 63, but the real story is heat and aero. Standard carbon-ceramic brakes with 16.5-inch front discs (the largest AMG fits as standard), a fixed rear wing and reworked underbody cut front lift and add rear downforce, and a stack of extra radiators keeps the driveline cool lap after lap.

The aero changes trim 66 lb of front lift and add 33 lb of rear downforce over the GT 63. Cooling gets radiators in the front wheel arches plus top-mounted coolers for both differentials and the transfer case, run by an electric water pump. It rides on 21-inch forged wheels with Michelin Pilot Sport 5s, and Cup 2 R tires are a no-cost option. Mercedes hasn't published a separate curb weight, so the Pro is best understood as the standard car made track-durable rather than a lightweight.