The Italian sports car specialist brand has confirmed it is working on a more intense and performance-oriented version of the already insane Ferrari LaFerrari, and the model seen in these spy pictures - the Ferrari LaFerrari XX - is rumoured to push its connection to Formula One even further than the regular car.
The standard LaFerrari combines a 6.3-litre V12 engine with 588kW of power and 700Nm of torque with a Formula One-derived HY-KERS hybrid system with a combined output of 708kW of power and in excess of 900Nm of torque.
However, according to reports, the LaFerrari XX will adopt a turbocharged V6 engine derived from the company's F1 know-how - a move that would both lighten the car significantly, and could make it even faster than the standard version, which can sprint from 0-100km/h in 2.9 seconds and 0-300km/h in 15.0 seconds, and reach a top speed of more than 350km/h.
No power figures for the turbo V6 have been made public at this point, but as with the standard version it is said to send its power to the rear wheels via a seven-speed dual-clutch gearbox.
Ferrari sporting activity department chief Antonella Coletta was quoted by Top Gear as saying making the LaFerrari XX faster than the regular version would be "difficult".
But rather than focusing on outright straight-line speed, the LaFerrari XX is expected to adopt a range of suspension changes, revisions to its electronics systems, and slick tyres. As is clear from these spy images, a number of major aerodynamics modifications will also be seen.
Our sources said the car managed some "really quick laps" around the 20.8km Nurburgring test track, and there have been suggestions it may have set a time of 6:35.
The Ferrari LaFerrari XX is expected to be revealed in January or February 2015.
Click the Photos tab above for more images of the LaFerrari XX spied during testing.