The Ford Mustang GT and Dark Horse models can be upgraded to achieve higher horsepower, with some outlets reporting a 740 horsepower option for $9,995 and others mentioning an 810 horsepower supercharger kit. The supercharger kit may be available for around $10,000, although the price of a specific Ford Mustang Dark Horse SC model is uncertain, with one report suggesting it could cost $170,000. The availability and pricing of these high-performance options are not consistently reported across outlets.