• 2015 Ferrari FXX K

    The Ferrari FXX K (AKA the track-only LaFerrari) has finally made its debut. Check out all of its hybrid supercar awesomeness at TopSpeed.com!

The spiritual successor to the bonkers Enzo FXX

LISTEN 16:44

Enzo Ferrari had always been reluctant to build and sell road cars, but he had to do so in order to fund Scuderia Ferrari, the company’s main arm since its historical foundation in 1929. As the brand moved away from sports car racing in 1973 — continuing as a Formula One team only — Ferrari became more of a road-legal sports car builder rather than a race car manufacturer. However, Maranello did not forget about its racing roots completely and it launched a special XX program that included a host of road-legal supercars turned to track-only machines. It debuted with the F40 LM in the late 1980s and continued with the Enzo-based FXX in 2005. The program continued with the 599XX in 2009, but remained dormant since then. The unveiling of the 2014 Ferrari LaFerrari sparked rumors that a new track-ready supercar was underway and it all became reality when the FXX K was unveiled at the 2014 Finali Mondiali.

The latest vehicle in a line of track-prepped, limited-edition supercars is based on the LaFerrari and is the first to carry a hybrid drivetrain. Not only more powerful than its street-legal sibling, the FXX K is also more aerodynamic, lighter and quicker. It’s also a lot more exclusive, with only a few carefully selected customers having the privilege of ordering one. The FXX K also comes with its very own racing program, as well as an exclusive racing series on Formula One tracks around the world. The FXX K is finally official and we have just enough info to understand why this extreme LaFerrari is one of the most exquisite race cars ever built. Check it out in the review below.

Continue reading to learn more about the Ferrari FXX K.

  • 2015 Ferrari FXX K
  • Year:
  • Make:
  • Model:
  • Engine:
  • Transmission:
    7-speed DCT
  • Horsepower @ RPM:
  • Torque @ RPM:
  • Displacement:
    6262 cc
  • 0-60 time:
    2.8 sec. (Est.)
  • Top Speed:
    217 mph (Est.)
  • Price:
    1500000 (Est.)
  • Price:
  • car segment:
  • body style:


2015 Ferrari FXX K High Resolution Exterior Wallpaper quality
- image 581001
The Ferrari FXX K (AKA the track-only LaFerrari) has finally made its debut. Check out all of its hybrid supercar awesomeness at TopSpeed.com!
2015 Ferrari FXX K High Resolution Exterior Wallpaper quality
- image 580998
2015 Ferrari FXX K High Resolution Exterior
- image 581002

*** The LaFerrari’s already radical design was taken to a whole new level with the FXX K ***

The LaFerrari’s already radical design was taken to a whole new level with the FXX K. Up front, the standard splitter has been replaced by a larger piece, while the spoiler has been drastically redesigned into a twin-profile piece for increased downforce. The spoiler and splitter also sit 1.2 inches lower than usual. Lateral dive planes and vertical fins channel the air toward the car’s flanks for improved aerodynamics. The LaFerrari’s standard headlamps that extend above the wheel arches are also gone, replaced by tiny strips of LED lights. A new hood with redesigned vents and a black center piece rounds off the new front fascia.

A lot more changes are in store around back where nearly every detail has been redesigned. The split grille is the only component that remains untouched. A massive diffuser replaces the two-piece unit seen on the LaFerrari, flanked by single exhaust outlets on each side — the standard LaFerrari has a quad-exhaust layout. The spoiler and the taillights are also new, but the main highlight is visible right above the rear bonnet in the form of a rather unconventional wing.

*** A massive diffuser replaces the two-piece unit seen on the LaFerrari ***

The system actually consists of two vertical fins on each side with small, horizontal wings extending on the inside. Although it looks like a standard fixed wing that had its center piece chopped off, Ferrari says the components act as "guide vanes in the low drag configuration and boost the spoiler’s efficiency in the high downforce one." Weird-looking but clever!

The whole aerodynamic package delivers a 50-percent improvement in downforce in the low drag configuration and a 30-percent improvement in the more aggressive downforce configuration. This means a massive 1,190 pounds of downforce at 124 mph!

Exterior Dimensions

Length 4,896 MM (192.75 Inches)
Width 2,051 MM (80.74 Inches)
Height 1,116 MM (43.93 Inches)
Wheelbase 2,650 MM (104.33 Inches)


2015 Ferrari FXX K Interior
- image 580997

*** The FXX K’s interior is rather spartan when compared to the LaFerrari’s ***

As expected, the FXX K’s interior is rather spartan when compared to the LaFerrari’s. Ferrari ditched all the luxury and convenience features that are useless on the race track and replaced them with race-spec, lightweight components. A new center console resides between the seats, holding buttons and switches that operate everything from the A/C and the heater to KERS and the launch system.

Both the dashboard and the steering wheel are nearly identical to the road car’s, but most soft-touch surfaces are replaced by carbon-fiber inserts, including the center piece of the steering wheel. The door panels are also plain carbon-fiber boards.

The seats are also brand new, featuring massive bolstering on the sides, a carbon structure and race-spec harnesses. The red line running along the center piece, as well as the red contrast stitching add a dash of color to the otherwise black interior.

Lastly, the instrument cluster comes with different graphics and likely new display options, allowing the driver to monitor vital car data while on the track.


*** The hybrid drivetrain has been upgraded to deliver 1,036 horsepower and 664 pound-feet of torque ***

The FXX K gets the same hybrid drivetrain as the road-going LaFerrari, meaning the 6.3-liter V-12 is paired with an electric motor. The combo is more powerful in the FXX K, however, now churning 1,036 horsepower and 664 pound-feet of torque, a significant 86-pony improvement over the standard LaFerrari. The V-12’s output increased from 789 to 848 horses, while the electric unit was updated to deliver 187 ponies instead of 161. Ferrari says maximum torque sits at more than the standard Laferrari’s 663 pound-feet. The total output makes the FXX K more powerful than its main rival, the McLaren P1 GTR, which is rated at 986 horsepower.

The horsepower increase is possible due to a host of upgraded, race-bred internals, including new camshafts, a revised valvetrain with mechanical tappets, and redesigned intake manifolds. Also, the Italians ditched the exhaust system’s silencers for a more menacing note.

*** The HY-KERS system has been upgraded as well, with drivers having access to four different settings ***

The HY-KERS system has been upgraded as well, with drivers having access to four different settings through the Manettino dial on the center console. "Qualify" delivers maximum performance for short periods of track time, while "Long Run" focuses on performance consistency for longer stints. There’s also "Manual Boost" for instant maximum torque delivery and "Fast Charge," which allows a fast recharge of the supercar’s battery.

Although Ferrari has yet to release performance specs for the FXX K, the most powerful Prancing Horse ever developed is likely to be the quickest as well. While the street-legal LaFerrari needs 2.8 seconds to reach 60 mph from a standing start, the more powerful engine of the FXX K and its reduced curb weight should enable it to achieve the same sprint in about 2.6 clicks. Top speed probably remains unchanged at 217 mph, a mind-boggling figure even for a track-only car.

Drivetrain Specifications

Type 65-deg. V12
Bore and stroke 94 x 75.2 mm
Total displacement 6262 cc
Specific power 137 cv/l
Total maximum power 1,050 HP
Total maximum torque >663 LB-FT
V12 maximum power 860 HP @ 9,200 RPM
Maximum revs 9250 rpm
V12 maximum torque 553 LB-FT @ 6500 RPM
Electric motor output 140 Kw (190 HP)
Gearbox 7-speed DCT

Suspension and Brakes

2015 Ferrari FXX K High Resolution Exterior
- image 581000

*** The FXX K rides on Pirelli racing slicks that feature sensors that monitor longitudinal, lateral and radial acceleration ***

The chassis of the FXX K received a host of updates as well. To become the full-fledged race car Ferrari wanted it to be, the track-prepped LaFerrari gained an upgraded E-Diff electronic differential, F-Trac traction control, Side Slip Angle Control systems and high-performance ABS. These features were specially calibrated to suit the car’s new slick tires and can be controlled using the Manettino on the steering wheel.

Speaking of tires, the FXX K rides on Pirelli racing slicks that feature sensors that monitor longitudinal, lateral and radial acceleration, as well as temperature and pressure. The new rubber provides not only improved grip with the track surface, but also enables the traction control system to deliver maximum performance.

Behind the lightweight, ten-spoke rims, which are also brand-new, lurk larger, carbon-ceramic brake discs and race-spec Brembo calipers. More power and grip needs to be backed by increased stopping power, and these new brakes will make sure the FXX K is on its best behavior on all race tracks, no matter how tight or quick they are.

Suspension Front double wishbones
Rear multi-link
Tires (Pirelli P-Zero slicks with sensors ) Front 285/650 – R19 x10.5
Rear 345/725 – R20x13
Carbon ceramic brakes (Brembo) Front 398 x 223 x 36 mm
Rear 380 x 253 x 34 mm
Electronic controls ESC stability control

High perf ABS/EBD Performance anti-lock system/electronic brake balance

EF1-Trac F1 electronic traction control integrated with the hybrid system

E-Diff 3 third generation electronic differential

SCM-E Frs magnetorheological damping with twin solenoids (Al-Ni tube)

Aerodynamics active


Ferrari has never released pricing for the FXX K, but word has it that the supercar retails from around $3.1 million. For reference, the road-legal LaFerrari was sold for $1.3 million. With production limited to only 40 units, the track-ready LaFerrari will be offered to select Ferrari customers, most likely to those who already own a street-legal LaFerrari.


McLaren P1 GTR

The FXX K and the P1 GTR might not meet on the track too often, but the latter is the closest thing to the FXX K customers can buy. Also based on a road-legal hybrid supercar, the P1 GTR comes in a similar package: an aerodynamically enhanced body with tons of added parts for increased downforce, plus a massive wing atop its rear end. The interior is as track-focused as it gets, with acres of carbon-fiber making up the shell built on top of the MonoCage chassis. The center console is much simpler than the FXX K’s, while the steering wheels is based on the unit used by the McLaren MP4-23 Formula One car.

The P1 GTR is motivated by the same hybrid drivetrain found in the road-legal P1, but the combo now includes a motorsport optimized, 3.8-liter, twin-turbo V-8 and a lighter electric motor. The output sits at 986 horsepower, 83 ponies more than the standard P1. I expect the P1 GTR to sprint from naught to 60 mph in as low as 2.4 seconds, a 0.2-second improvement compared to the street-legal P1. Top speed should remain unchanged at 217 mph.

Pricing for the P1 begins at a bit more than $3 million, but you won’t be able to purchase one unless you already own the streetable P1. Included in the massive sticker are private consultations with the McLaren driver-fitness team and company design director Frank Stephenson, as well as access to one of McLaren’s dedicated racing simulators. Customers will also benefit from at least six drive events to be held on certain Formula One tracks. Production of the P1 GTR is limited to only 58 units.

Read our full story on the McLaren P1 GTR.

History of the Ferrari XX line

1989 - 1994 Ferrari F40 LM/Competizione

1989 - 1994 Ferrari F40 LM
- image 38710
Ferrari F40 LM

After clamoring from F40 fans everywhere, Ferrari finally succumbed to the requests and offered the public a track-tuned variant of the F40 between 1989 and 1994. Only 10 units were built in total, with the first two carrying the name “F40 LM” and the last eight carrying the “F40 Competizione” name.

This racer pumped out a massive 700 horsepower at 8,100 rpm from its twin-turbocharged 2.9-liter V-8 powerplant. This allowed it to hit a top speed of 367 km/h (228 mph), which is 47 km/h (29 mph) faster than the stock F40.

Sure, the F40 LM/Competizione may not carry the “XX” badge, but it is where the entire line is rooted.

2005 - 2007 Ferrari FXX

2005 Ferrari FXX
- image 37828
Ferrari FXX

The Ferrari FXX is truly the first of the XX line and it had a production life lasting from 2005 through 2007. This Enzo on steroids pumped out 789 horsepower from its 6.3-liter V-12 engine – 138 horsepower more than the Enzo – cost a whopping $1.8 million and had a mammoth top speed of 243 mph.

On top of the base model’s production life, the FXX program continued for an additional two years under the “FXX Evoluzione” name. This package lowered the car’s aerodynamic drag, bumped the power to 850 ponies, reduced shift times by 20 milliseconds and installed an improved traction-control system. This package gave the FXX a 0-to-100-km/h (62 mph) time of 2.5 seconds and a top speed of 249 mph.

2009 – 2013 Ferrari 599XX

2009 Ferrari 599XX
- image 296349
Ferrari 599XX

The 599XX, which was based on the 599 GTB, followed up the FXX Evoluzione program when it debuted in Geneva in 2009. This bad boy carried a 6-liter V-12 engine that put 700 horsepower to the pavement at 9,000 rpm. In addition to the power bump, the 599XX also was far lighter than its 599 GTB donor, thanks to lighter engine components, composite construction, and carbon-fiber body and brake pads. Additionally, the gearbox was modified to knock shift time down to 60 milliseconds.

As if the power wasn’t enough, the aerodynamics of the car were tuned to produce 617 to 1,389 pounds of downforce, depending on your speed.

Much like the FXX, the 599XX also received an Evoluzione package, creating the 599XX EVOThis package added in extra electronic controls, Pirelli rubber, a revised aero package, 35 kg (77 pounds) of weight loss, an automatic rear spoiler and a small bump to 740 horsepower. This upgrade sold for an outrageous £160,000.


2015 Ferrari FXX K High Resolution Exterior
- image 580999

If the LaFerrari is the pinnacle of Ferrari evolution in terms of technology, hybrid drivetrains, output and speed, then we definitely need a new name for the FXX K. We’re essentially looking at the most radical Ferrari ever built, and the fact that it’s packed with racing technology and comes with a heavily modified shell for extreme downforce makes it that much better. Sure, this is a supercar we will never see blow by us and our plebeian cars on the highway, but we must not forget that Ferrari was born as a race car manufacturer before anything else.

All told, the FXX K adds even more exclusivity to the Ferrari brand, not only by being incredibly expensive and limited as a production car, but by being the kind of hypercar customers can hoon only on the track. Heck, I have a hunch customers won’t even be allowed to take the FXX K home over night, which speaks volumes about what the Prancing Horse badge stands for nowadays.

  • Leave it
    • Confined to the track
    • Extremely expensive
    • You can’t buy one unless you own several Ferraris and you’re on some special list

Update History

Updated 11/11/2014: According to TopGear the new LaFerrari XX should be unveiled during Ferrari’s World Finals in Abu Dhabi in early December. Also, the car has been described as the "most extreme production-derived car in Ferrari’s history" as it will deliver no less than 1,050 HP - or 100 HP more than the standard LaFerrari.

Spy Shots

April 17, 2014 - LaFerrari XX testing at Nurbrugring

2015 Ferrari FXX K Exterior Spyshots
- image 549975
2015 Ferrari FXX K Exterior Spyshots
- image 549977
2015 Ferrari FXX K Exterior Spyshots
- image 549979
Ciprian Florea
Ciprian Florea
Senior Editor and Supercar Expert - ciprian@topspeed.com
Ciprian's passion for everything with four wheels (and more) started back when he was just a little boy, and the Lamborghini Countach was still the coolest car poster you could hang on your wall. Ciprian's career as a journalist began long before earning a Bachelor's degree, but it was only after graduating that his love for cars became a profession.  Read full bio
About the author

Press Release

Ferrari’s new FXX K research and development programme receives its world premiere next weekend at the Yas Marina Circuit in Abu Dhabi. The laboratory-car is based on Maranello’s first hybrid model and will grace the world’s tracks from next year onwards. The K in its moniker is a reference to the “KERS” kinetic energy recovery system it adopts in maximising its track performance.

2015 Ferrari FXX K High Resolution Exterior Wallpaper quality
- image 580998

Unfettered by homologation and racing regulations, the FXX K will never be used in competition. It was, in fact, developed to be completely uncompromising, incorporating technological innovations that will guarantee an unprecedented driving experience to the exclusive group of Client-Test Drivers with whom the Prancing Horse will roll out a test programme over the coming two years.

The car’s enormous potential is attested to by two significant figures: a total power output of 1050 cv (860 cv delivered by its conventional V12 engine and 190 by its electric motor) and maximum torque in excess of 900 Nm.

The FXX K’s 6262 cc 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 as its silencers have been eliminated.

The HY-KERS system has been evolved specifically for pure performance with the result that the driver can control the function logics from the specific 4-setting Manettino on the centre console: Qualify, for maximum performance within a limited number of laps; Long Run to optimise performance consistency; Manual Boost for instant maximum torque delivery; and Fast Charge, for a fast recharge of the car’s battery.

2015 Ferrari FXX K High Resolution Exterior
- image 580999

A focus on delivering maximum efficiency at every stage of every track lap has resulted in extensive but integrated work on the entire car body in terms of both active and passive aerodynamics.

The front of the car 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 WEC, 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 its efficiency.

The solutions on the rear of the car are highly sophisticated, too. The tail section is now higher and the mobile spoiler extends further for a total increase in extension of 60mm when fully deployed. A vertical fin and a small wing each side of the tail act as guide vanes in the low drag configuration and boost the spoiler’s efficiency in the high downforce one. This system also creates considerable downforce at the rear of the car, allowing the use of an extreme diffusion volume for the rear diffuser which optimises air extraction from the underbody. The section of the flat underbody just ahead of the rear wheels is also exploited to the full to generate downforce thanks to the reduced pressure in the wheel arch guaranteed by the direct connection to the rear of the car by a by-pass duct.

The result is a 50% improvement in downforce in the low drag configuration and a 30% improvement in the more aggressive downforce configuration, resulting in a figure of 540 kg at 200 km/h.

Vehicle dynamics are further improved by the adoption of Pirelli slicks complete 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 vital data to enable the traction control system to guarantee maximum performance.

2015 Ferrari FXX K High Resolution Exterior
- image 581000

The intervention level of the E-Diff electronic differential, F-Trac traction control, Racing SSC (Side Slip Angle Control) – now specially calibrated to suit the car’s slick tyres – and the high-performance ABS can be controlled using the five-position Manettino on the steering wheel.

View the full press release Hide press release
Press release

Related Articles

This Ferrari Showdown Will Get You Stoked For The Weekend

What do you think?
Show Comments
Car Finder: