This is the Ferrari 599X, a hardcore track-focused version of Ferrari's 599 Fiorano.

The Ferrari 599XX gets a retuned version of the 599's V12 engine, with its rev limit boosted to 9000rpm and its weight reduced by the adoption of a new crankshaft and more extensive use of carbonfibre in ancillary parts. Ferrari says it "achieved its goal" of just under 700bhp at 9000rpm.

The power is transmitted through a new version of Ferrari's robotised manual gearbox that features shift times of just 60ms. Ferrari claims that the 599XX can lap its Fiorano test track in 1m 17sec, less than a second off the time of the Enzo-based FXX that it will replace.

Live at Geneva 2009: watch the Ferrari 599XX video blog

The most obvious external alterations to the regular 599 are a variety of carbonfibre additions, including a small roof spoiler, carbonfibre brake disc covers and a enormous carbonfibre undertray and rear diffuser. Inside, the cabin has been stripped out to race specification, with a bare dashboard and carbonfibre cladding. It does feature a display screen, however; it's used by Ferrari's 'virtual car engineer', which provides instantaneous data on the vehicle's efficiency.

See more pictures of the Ferrari 599XX

The 599XX replaces the FXX as the customer-owned testbed for Ferrari's engineers. Buyers (drawn from Ferrari's most valued customer base) will only be able to drive the car at Ferrari-nominated track days in 2010 and 2011, and they will even be able to pay for the car to be stored at a Ferrari facility. In return, Ferrari's engineers will download gigabytes of data to use in future production projects.

Ferrari has also used Geneva to unveil a handling package for the regular roadgoing 599.

Read more about the 599's handling package

Geneva cars: news and images

Chery DR, Ferrari 599XX, Ford Iosis Max, Frazer Nash Namir, Hyundai ix-onic, Infiniti Essence, Kia No3, Lagonda Concept, Lamborghini Murcielago SV, Land Rover Freelander TD4_e, Mazda CX-7, Mini JCW Cabriolet, Mitsubishi iMIEV Sport Air, Nissan Qazana, Renault Megane RS, RUF Greenster, Skoda Fabia vRS, Skoda Yeti, Tata Nano Europa, Toyota Prius, Volkswagen Polo

Autocar.tv: see Mike Duff's in-depth Geneva show coverage

Lagonda Concept, Skoda Yeti, Rolls Royce 200 EX, Vauxhall Ampera, Nissan Qazana, Infiniti Essence, Bentley Continental Supersports, Ford Iosis Max

Video blogs from the show floor

Audi TT RS, Ferrari 599XX, Hyundai ix-onic concept, Kia No3, Lamborghini Murcielago SV, Mercedes E-class coupe, Peugeot 3008, Renaultsport Megane, Subaru Legacy, VW Polo