Remember that mysterious Pagani Huayra prototype we showed you a while ago with massive wing at the back? Well, it’s back in a new spy video, flaunting that spoiler like a peacock’s tail as it goes on the San Martino del Lago race track for a spot of performance testing.

This hard-core, ultra high-performance Pagani Huayra prototype could be the “S” version we’ve been waiting for, or maybe even the track-only “R” version, although both of those models should logically be launched after a Roadster variant has been released. We’re gonna have to wait a bit longer to find out what’s the deal with this car.

Besides boasting a massive rear wing, this version of the Huayra also comes with a new rear diffuser, new front splitter, and side flaps. Whichever way you cut it, this car has race car-grade aerodynamic features. Hopefully that means it also has a race-grade engine with a lot more power than the Huayra’s 700.