2025 Mustang Dark Horse Cost And Features. Robust horsepower and a sleek exterior aren’t the only features defining the dark horse trim. It may have 20 fewer horsepower, but 480 ponies.

For starters, the gt fastback is marked up to $47,540, a $2,600 increase from the 2024 model. The 2025 mustang ® dark horse ™ coupe is street legal — and track ready.