Ferrari Corse Clienti’s XX Programme claimed two strong successes from 2005 to 2010, first with the Enzo-based FXX model and then with the 599 GTB-derived 599XX. Conceived as a means of both developing new road car systems while engaging preferred loyal customers, the XX Programme positioned these two models as track-only, non-competition cars whose owners could use them in marque-sponsored events. The resulting data would be poured into a future Ferrari model, ensuring satisfaction and gain for both customer and manufacturer—the proverbial win-win.

Of course, a true successor to the FXX could only evolve with the arrival of a new Ferrari hypercar model, a milestone that eventually transpired at the 2013 Geneva International Motor Show. With all eyes on one of the world’s greatest stages for automotive debuts, Maranello introduced the potent and beautiful hybrid LaFerrari. Once this was accomplished, it was only a matter of time before an exclusive track-only version for use in Corse Clienti events would follow. Sure enough, at the Finali Mondiali held at Yas Marina Circuit in Abu Dhabi in 2014, Ferrari unveiled the LaFerrari-based FXX K, a breath-taking fusion of form and function.

Like the LaFerrari, the FXX K was propelled by a Formula 1-derived Hy-Kers hybrid powerplant centred on a further version of the type F140 V-12 engine, the F140 FF, now displacing 6.3 litres. The mill was upgraded with new camshafts with mechanical (rather than hydraulic) lifters, specially polished intake manifolds, and a new exhaust system without mufflers, contributing to an increase to 848 horsepower.

A "Manettino" dial on the centre console provided four different levels of assist from an electric motor, including one designed for “instant maximum torque delivery”, offering an additional 187 horsepower. With total output now reaching 1,035 horsepower, 85 more than the LaFerrari, this was undoubtedly a thoroughbred of unprecedented stature.

The LaFerrari bodyshell underwent numerous tweaks for optimal aerodynamic performance on the track, with the nose receiving a two-part splitter with vertical fins on either end, while the rear end was transformed with twin spoiler-ettes to manage airflow, improving downforce by as much as 50 per cent over the LaFerrari. Boasting a much more menacing stance, the FXX K is 194 millimetres longer and 59 millimetres wider than its road-going sibling, while shedding some 90 kilograms for a weight of approximately 1,255 kilograms. The improved power-to-weight ratio was evident in the new car’s testing times, as it lapped Fiorano in just 1min14sec, five seconds faster than the LaFerrari.

In 2017, following the pattern of the prior two XX Programme models, Ferrari began offering an Evoluzione upgrade for FXX K owners. The FXX-K Evo featured a host of aerodynamic refinements, including redesigned rear brake intakes and a fixed full-width dual rear wing that sits over an active spoiler, in total improving downforce by 23 per cent over the FXX K; and a shocking 75 per cent more than the original LaFerrari.

As with its two predecessors, production of the FXX K was kept to a minimum with approximately 60 examples currently accounted for. It remains the most advanced product of the XX Programme to date and, for the time being, the ultimate customer-available Ferrari development car.

Offered by its original owner, this 2018 Ferrari FXX-K Evo was purchased in October 2017—according to the agreement document on file. Part of the final batch of approximately only 20 FXX K examples which were delivered new from the factory with the highly desirable Evo upgrade package, chassis number 238035 is presented in Rossa Martino with Bianco Avus accents. The race number “87” boldly sits on each flank to complete the livery. With just 60 examples of the FXX-K produced, this example’s rarity is bolstered by belonging to a handful of cars produced new in Evo specification. At the time of cataloguing, the odometer displayed 4,244 kilometres. Meanwhile, a technical report published in June 2024 indicated 85 per suspension bushing life, 45 per cent for the driveshaft, 85 per cent on the gearbox, and 85 per cent for the engine life.

Significantly, a Corse Cliente invoice on file confirms the FXX-K received a high-voltage battery overhaul in April 2024. At this point, the complement of fluids were flushed and replaced in addition to the installation of new brake pads. The total cost for the work amounted to €68,511.89. It is further accompanied by its “Yellow Book” for special-edition models

As one of Maranello’s most ferociously advanced production-based track cars yet devised, chassis 238035 would make for an outstanding acquisition for any supercar enthusiast, racing participant, or marque aficionado. The next caretaker can look forward to a warm welcome at marque-focused concours d'elegance and Corse Clienti events or relish the unique thrill of testing the car’s limits on circuit, where the wrath of 1,035 horses can be harnessed in stunning fashion.