This is the Ferrari FXX K, so hardcore and uncompromising that one might spew out expletives upon hearing what it’s made of. The laboratory-car is based on the LaFerrari, Maranello’s first hybrid model, and will grace the world’s tracks from next year. The ‘K’ in the name refers to the KERS kinetic energy recovery system the FXX K adopts to maximise track performance.

The FXX K is moved by 1,050 horses, 860 hp from a 6,262 cc V12 engine and 190 by an electric motor. Maximum torque is over 900 Nm, 750 Nm of which comes from the internal combustion engine. A seven-speed dual-clutch transmission completes the powertrain.

The V12 features new camshafts and a modified valve train with mechanical rather than hydraulic tappets. The intake manifolds have been redesigned and given a special type of polishing treatment. The exhaust system has been modified and silencers have been removed.


Ferrari’s HY-KERS system has been tailored specifically for pure performance here. There are four settings on the Manettino: Qualify for max performance within a limited number of laps, Long Run to optimise performance consistency, Manual Boost for instant max torque delivery and Fast Charge for a fast recharge of the car’s battery.

It’s pretty obvious that plenty of aero work has gone into this car. The front is dominated by a twin-profile spoiler and a larger splitter, which is 30 mm lower, with a gap in its centre. This design is an application of the concepts developed to improve aero balance in the GT category of the FIA World Endurance Championship, which Ferrari has won for three consecutive years.

Two pairs of vertical elements, an endplate and, externally, a dive plane, together with vertical fins channel the air towards the car’s flanks, generating a longitudinal vortex that creates a localised depression. This in turn sucks the wake from the wheels to the outside of the aerodynamic underbody. Along with the side skirts that extend out from the sills, the vortex helps isolate the airflow from the underbody to boost efficiency.


At the back, the tail is higher and a mobile spoiler extends further for a total increase of 60 mm. A vertical fin and a small wing at each side act as guide vanes in the low drag mode and boost the spoiler’s efficiency in the high downforce one. This system also creates considerable downforce, 50% improvement in the low drag configuration and a 30% improvement in the more aggressive setting, or 540 kg at 200 km/h.

This mega LaFerrari rolls on Pirelli P-Zero slicks with sensors that monitor longitudinal, lateral and radial acceleration, as well as temperature and pressure. This ensures an accurate analysis of the interaction between the tyre and track surface, providing even more data for the traction control system.

The intervention level of the E-Diff electronic differential, F-Trac traction control, Racing SSC (Side Slip Angle Control) – specially calibrated to match the slicks – and the high-performance ABS can be controlled via the Manettino. Carbon ceramic Brembos are handed the task of stopping those 1,050 Italian stallions.

Unhindered by homologation and racing regulations, the FXX K will never be used in competition. It was designed for an exclusive group of “Client-Test Drivers” in Ferrari’s XX driver development programme that will run over the next two years.

The “regular” LaFerrari