Developed beginning in 2022, the Mustang GT3 was designed to meet Group GT3 regulations as a joint project between Ford Performance and Multimatic Motorsports. The car was built to provide Ford with a global GT3 platform, replacing previous racing iterations with a chassis based on the Dark Horse production model. It was formally unveiled on June 9, 2023, during the 100th anniversary of the 24 Hours of Le Mans.
The Mustang GT3 is powered by a 5.4-liter naturally aspirated Ford Coyote V8 engine, which was developed in partnership with M-Sport. Technical management is handled by a Bosch MS 6.4 engine control unit, while the drivetrain consists of a 6-speed Xtrac sequential manual transmission and a four-plate AP Racing clutch featuring a MEGA-line e-clutch actuator. To optimize weight distribution, the transmission is positioned closer to the rear axle.
The chassis utilizes an FIA-homologated fully-integrated compliant racing roll cage. The suspension system employs double wishbones on both the front and rear axles, paired with Multimatic five-way adjustable DSSV dampers. Braking is provided by Alcon discs. The bodywork was designed with quickly replaceable parts to facilitate rapid repairs during endurance events.
The car's competitive history began in 2024 with factory-supported and customer efforts from Proton Competition and Multimatic Motorsports. Early in its debut season, the car faced reliability challenges where the boot lid and diffuser would come loose or detach entirely. Despite these setbacks, the Mustang GT3 secured its first pole position at the 2024 Michelin GT Challenge at VIR with Proton Competition, while Multimatic Motorsports earned the model's first podium in the same event. Proton Competition also achieved a podium finish at the 2024 24 Hours of Le Mans.
In 2025, the program expanded to include teams such as Dollahite Racing, Gradient Racing, Haupt Racing Team, and Riley Motorsports. The Mustang GT3 earned its first victory at the 2025 24 Hours of Daytona after a contest with BMW and Chevrolet. Further success followed at the 2025 24 Hours of Nürburgring, where Haupt Racing Team secured a class win in SP 9 Pro-Am and finished 4th overall.
During its first year of competition, the Mustang GT3 required specific regulatory intervention due to bodywork failures. Ford believed the detachment of the boot lid and diffuser was caused by disrupted airflow when following other cars closely. Consequently, the Fédération Internationale de l'Automobile granted Ford an "erratum fix," allowing the manufacturer to implement reliability updates to the car to resolve the issue.
On November 13, 2025, Ford began testing an "Evo" kit for the Mustang GT3 at Daytona International Speedway. This evolution package, detailed in December 2025, introduced upgrades to vehicle dynamics based on the initial competition cycle. These refinements include a revised front splitter, rear diffuser, and dive planes, alongside an updated Brembo brakes package and improved suspension components.
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