The S650 Mustang has been built since May 1, 2023, with the turbo EcoBoost four, the V8 GT and the 500-horsepower Dark Horse. The GT's fourth-generation Coyote V8 is rated at 480 to 486 horsepower. Ours is a 2024 Mustang GT in Dark Matter Gray, with an automatic gearbox. It wears a front spoiler and a Dark Horse-style rear spoiler.