Its new Shelby GT350 has already been heralded as one of the best track Mustangs ever built, but an even more potent Shelby iteration could be on the horizon.

According to Autocar, Ford is working on a Hellcat-besting 800-horsepower Shelby Mustang, due to arrive sometime in the next few years. A twin-turbocharged V8 will be at the helm, and an even more aggressive aero kit will be affixed, which you’re able to distinguish in some early spy shots.

2014 Ford Mustang Shelby GT 500

If you’re keeping count, that’s 274 extra ponies up from the Shelby GT350, and 138 up from the previous generation Shelby GT500. That 800 horsepower would make it not only the most powerful muscle car on the planet, but one of the most powerful cars ever made.

Of course, this is all just speculation at this point. Spy shots around Ford’s Dearborn, Michigan, headquarters are pointing towards a new, more aggressive Mustang, but nobody will know for sure exactly how much power will be under the hood until we see the real thing.