2021 Ford Mustang Shelby GT500 Updated With Bold New Colors, Options Feb 09, 2021 at 12:06pm ET ++ Update: This story has been updated with official information and images from Ford. Details of the 2021 Ford Mustang Shelby GT500, along with the entire next model year lineup, officially and accidentally came out as early as September last year. While the biggest addition to the 2021 pony car lineup was the Mustang Mach 1, we also learned that a new Carbon Fiber Handling Package, which marries the $18,500 Carbon Fiber Track Pack and the $1,500 Handling Pack, will be added to the options list for the supercharged 'Stang. We didn't know the pricing back then, but we now have a definite number thanks to an order form shared by Ford. According to the company, the Carbon Fiber Handling Package is a $10,000 option, right in between the aforementioned Track Pack and Handling Pack. The 2021 Mustang configurator isn't up on Ford's website as of this writing, but we already know that the new option comes with 20-inch black carbon fiber wheels, adjustable strut top mounts, catch can, Gurney flap, and splitter wickers.