Headline figures include a power output of 1021bhp. It’ll be seen in action from 2015, although it will only be available to an elite group of owner-drivers who will be entered into Ferrari’s XX driver development programme.
The model costs €2.2 million before local taxes, and with "less than 40" being made in total it's no surprise to hear it's already completely sold out.
The FXX K name refers to the car's KERS kinetic energy recovery system, which works in conjunction with the standard car's 6.3-litre naturally aspirated V12 engine to produce a total system output of 1021bhp and more than 664lb ft of torque. That's 71bhp more than the standard LaFerrari, with 835bhp coming from the V12 engine and 188bhp from the electric motor.
Ferrari hasn't revealed any performance data for the McLaren P1 GTR rival, but expect improvements on the LaFerrari's 0-62mph sprint time of less than three seconds, as well as its 217mph-plus top speed. As with LaFerrari, drive is channeled through a seven-speed paddle-shift dual-clutch automatic transmission.
The FXX K measures 194mm longer and 59mm wider than the LaFerrari, at 4896mm and 2051mm respectively, but shares the same height of 1116mm as well as its 2650mm wheelbase. Ferrari has also dropped some 90kg from LaFerrari's kerb weight, meaning the new FXX K weighs in at around 1255kg.
Stylistically, the FXX K looks like a race-inspired evolution of LaFerrari's shape. A new twin-profile spoiler and large splitter – which is 30mm lower than on LaFerrari and includes a central gap to channel air flow– can be seen at the front. This works in conjunction with the larger side sills running down the flanks of the car to stop air gathering underneath.
At the rear, a large, twin-pronged permanent spoiler features alongside a secondary mobile spoiler which can extend on the move. The distinctive shape of the rear is designed to boost downforce, and is helped by the new rear diffuser.
Ferrari says this has helped improve downforce by 50 per cent compared to LaFerrari, resulting in the FXX K producing 540kg of downforce at 124mph. The FXX K can lap Ferrari's Fiorano test track in just 1m 14sec, some five seconds faster than LaFerrari.
Inside, the FXX K does away with many of the luxuries of LaFerrari, although it keeps a digitised instrument cluster.
The FXX K sits on special slick Pirelli P-Zero tyres, which incorporate sensors to measure acceleration, temperature and pressure. Carbon-ceramic brakes, manufactured by Brembo, also feature. The car's traction control, Side Slip Angle Control and electronic differential have been specially calibrated to suit the performance rubber, while drivers can control ABS settings via the steering wheel.
Whereas the standard LaFerrari featured a double wishbone suspension set-up front and rear, the FXX K instead adopts a multi-link rear set-up.
Key changes made to the LaFerrari's V12 engine include new camshafts, a modified valve train, redesigned intake manifolds, and the use of mechanical rather than hydraulic tappets. The car's exhaust system has also been modified.
Similarly, the HY-KERS system has been upgraded, giving drivers the option of controlling power with four different modes with the 'Manettino' controller.
Qualify mode provides maximum power for a short number of laps, while Long Run optimises performance for longer stints. Manual Boost mode delivers instant maximum torque, while Fast Charge mode can be used to recharge the car's battery.