The Prancing Horse will use the 36th edition Bologna Motor Show are the venue for the unveiling of the Ferrari 599XX Evolution, an even more extreme version of the street-legal 599 GTB than the 599XX.
This new, non-homologated sports berlinetta comes with a series of performance-enhancing technical features which include an improved chassis, an active aerodynamic package and new Pirelli tires.
The engine now weights with 35 Kg less then before, but it is with 20 HP more powerful, as it delivers a total of 750 horses and 700 Nm of torque through a transmission that now features a shorter final gear ration. The result is of course a faster car which laps the Fiorano in just 1minute and 15 seconds.
The aerodynamic enhancements mainly consist of an active rear wing with two flaps featuring profiles similar with the ones used in F1, which works in accordance to various parameters (steering wheel angle, longitudinal acceleration, lateral acceleration and vehicle speed) that are determined via the car’s ESP, ABS, SCM and F1-Trac electronic functions. The other elements include a modified front splitter and new diffuser that generates 330 Kg of downforce at 200 Km/h and 440 Kg when the foot-plates are closed.
What is also new in the Ferrari 599XX Evolution is the adoption of side exhausts, and we don’t know about you, but we are really curious to find out what this thing is capable of achieving on the Nurburgring.
Anyway the 599XX Evolution will only be available to "clients participating in the track-based research and development programme for the 2012-2013 seasons". 

Source: Ferrari