Forget Dodges 707… Get this 840HP Mustang GT500!

While the 2015 Challenger and Charger Hellcat models remain the most powerful muscle cars ever, Ford offers up a limited edition version of the 2014 Shelby GT500 with nearly 150 more horsepower.

Dubbed the “Super Snake”, it features a “greatest hits” list of Shelby’s most popular upgrades, pushing its horsepower output to an impressive 850.

You must already own a standard 2007-2014 GT500 coupe or convertible, which Shelby when then give a thorough performance upgrade — including a new 3.6-liter Kenne Bell supercharger, an upgraded Shelby Performance radiator, heat exchanger, and aluminum cooling tanks.

The Signature Edition Ford Shelby GT500 Super Snake, a ‘greatest hits’ of Shelby’s most popular upgrades for the outgoing GT500, and a package available to only 50 models and only until January 31^st. So if you want one…you’d better act quickly.

Shelby also fiddles with the suspension, adds upgraded brakes in the rear, sets the new Signature Edition on forged Weld wheels, and graces the dash with Carroll Shelby’s signature (standard Super Snake interior shown above). Though not included, Shelby’s widebody package can be added at extra cost. But as a bonus, each of these sinister ophidians come available in any hue from the firm’s color palette (including stripes) and include a day of Shelby moderated track driving.

So what’s the total damage? Shelby prices this rare serpentine conversion at a cost of $44,995, which doesn’t include the donor GT500. Pricy? Yes. Probably ridiculously fast? We’d reckon so.