Officially, the Pagani Zonda’s production run lasted from 1999 through 2011, with just 206 examples ever built. Toward the end of the car’s production run, beginning in 2009, Pagani produced a track-only version of its supercar called the Zonda R.

Only 15 Zonda R models were built over the car’s lifespan, and it’s said the uber-supercar was created as a rolling testbed for Pagani’s latest masterpiece, the Huayra. The Zonda R quickly proved itself as one of the fastest cars in the world, lapping the Nürburgring Nordschleife in an astonishing 6:47.

Word of an updated Pagani Zonda R variant called the Zonda R Evo has been circulating for about the past month, and now comes footage of this mysterious beast courtesy of Marchettino’s YouTube channel.

From what we can tell, the Evo version features improved aerodynamics, and is said to pack as much as 771 horsepower beneath its carbon fiber hood. There are suspension enhancements, too, which should make the new version capable of besting the Zonda R’s current Nürburgring lap record.

There’s no word yet on how much it will cost existing Zonda R owners to upgrade to the Evo package, but we’d be willing to bet all 15 owners will get orders in quickly. Rumor has it that the car will debut at this year’s Goodwood Festival of Speed, set to kick off next week.