The teaser sketch shows a new rear wing and a redesigned fender vents, with a promise of "all new levels of performance."

Not content with debuting just one hypercar in Geneva, Koenigsegg has officially unveiled its Agera RS--the lightweight, more track-oriented version of its already-insane Agera.

The Agera RS is not as wild as its big brother, the Regera, but it's no slouch. Boasting more than 1160 horsepower (more with E85 in some countries) from its twin-turbocharged, 5.0L V8, the RS will likely be able to get out of not just its own way, but around the laws of physics as well.

The Agera RS' carbon fiber diet has resulted in a curb weight of only 3,075lbs, and its new new aero features result in 450 kg of downforce at 250 km/h (992lbs at 155 mph). Buyers can opt for several advanced performance features, including front hood vents (aero), an active front venturi flap inspired by the One:1, adaptive ride height, integrated side winglets, the aforementioned E85 fuel tune and a roof scoop.

The interior is ripe for customization as well. Anodizing options are available for interior trim pieces, and buyers can opt for contrast-stitched or -piped seats, floor mats or headliners. Those who want a little bling with their zing can also get a diamond-encrusted key fob, a full audio system, a rear-view camera and even a matching luggage set (requisite roof box also available). For Agera RS consumer who wants to minimize his or her carbon footprint, a winter wheel set is also available.

Despite its track-rat mission, the Agera RS will be legal for the road, but you'll have to find one first. Only 25 will be built, and apparently nearly half are already spoken for.

Live photos by Ronan Glon.