With the new facelifted Ford Mustang on the horizon, there is a new range-topping GT500 variant in the works. The origin of the upcoming GT500’s engine is still unconfirmed, though initial reports suggest it could be a twin-turbocharged bent eight producing up to 800 hp.

Dodge Challenger Demon aside, the upcoming GT500 is set to wade into horsepower battle against the likes of the 707 hp Dodge Challenger Hellcat and perennial GM rival, Chevrolet with its 650 hp Camaro ZL1 1LE. Compared to the Camaro ZL1 1LE, the GT500 mule here appears to sport a more conservative aero kit, at least with its lack of rear wing.

Given the 2018 Mustang has made its debut with its mid-lifecycles revisions, at least some of these can be expected to feature on the Mustang GT500 when it is officially unveiled. Wheel designs can’t be gleaned from the development unit here with its covered wheels, though that may point towards another development; possibly uprated, carbon-ceramic brakes.

There’s some rather serious rubber on the front axle, too. The upcoming GT500 has been spotted with 305/30ZR20 tyres, making it a rival for the Chevrolet Camaro Z/28 in the front tyre width stakes. Naturally, to maintain balance on a powerful rear-wheel drive car, the rears should be even wider. The Mustang GT500 is expected to debut next year, as a 2019-model year release.

GALLERY: 2018 Ford Mustang