The speed freaks at Hennessey are no stranger to cranking the wick on American muscle cars, with a parade of overpowered vehicles littering the back catalog like discarded chip bags. This time around, its crew has turned its attention to the Ford Mustang GT and Dark Horse —and found a stable of extra ponies in the process.

Hennessey Performance, the brazen Texas-based tuner, modifier, and manufacturer of high-performance vehicles, has added a new weapon to its arsenal of offerings: The Super Venom Mustang. Intended to commemorate Hennessey's 1991 founding date, production is limited to 91 examples.