While there’s no shortage of rare Ferraris that often fetch millions at auction; to truly fit the description of the rarest Ferraris ever made, nothing says that better than 1-of-1 builds. While it seems plausible to assume that most are vintage and classic beauties, you’d be surprised by how many such cars with a prancing horse badge also belong to more modern times. Some were commissioned directly through Ferrari’s Special Projects division. In contrast, others were design studies or coachbuilt experiments that became unique road cars for loyal clients of the brand, the kind who are part of their racing programs. Each was built once, never repeated, and within the prancing horse hierarchy and lineage, today sits at the very top of the exclusivity pyramid. So with that, here’s an overview of some of the Italian marque’s true one-offs. This is a mega-list featuring the rarest Ferraris in the world, of which several examples carry seven-figure valuations, even rivalling the most expensive Ferraris of all time.
2023 Ferrari SP-8
Base: F8 Spider | Classification: Factory SP
Commissioned by a Taiwanese collector, the SP-8 builds on the F8 Spider platform but reimagines it as a full roadster with no roof and a unique full-width cast aluminium grille and a unique two-tone aesthetic: the front portion features unpainted carbon fiber (with a glossy iridescent “Blue Sandstone” finish) wrapping into the tail, that contrasts against a matte Argento Micalizzato paint on the rear sections.
Ferrari carried out extensive CFD, wind tunnel, and track testing to recover lost stiffness, optimize aerodynamics, and manage acoustic comfort. It packs a 3.9-liter twin-turbo V8 rated at 710 horsepower and 568 pound-feet of torque. While Ferrari has not released official 0–60 mph or top speed figures, expect a sub-3.0 second time to 60 mph and a top speed in excess of 211 mph.
2023 Ferrari KC23 488 GT3 Evo
Base: 488 GT3 Evo | Classification: Factory SP (Track Only)
The KC23 is a bespoke one-off track machine built for a private customer, and based on the highly competent 488 GT3 Evo chassis. Ferrari retained the twin-turbo 3.9-liter V8 and competition spec gearbox but reworked suspension, cooling, and aerodynamics to match this bespoke shell. While the exact power figures weren’t disclosed, the donor 488 donor in GT3 spec packs about 600 horsepower and 516 pound-feet of torque.
The body finished in a Gold Mercury finish with liquid metal is unique: with a deep front splitter, a radical rear diffuser, wide wheel arches, sculpted side pods, unique two-piece center-lock wheels, and a removable wing. Inside, you get a roll cage and a full race-spec cockpit. As it isn’t street-legal and doesn’t have to comply with homologation, it serves as a showcase of what Ferrari’s engineers can do when given complete design freedom, further blurring the line between client car and factory race program.
2022 Ferrari SP48 Unica F8 Tributo
Base: F8 Tributo | Classification: Factory SP
The SP48 Unica is yet another one-off based on the F8 platform, the Tributo this time around. Ferrari retains the 3.9-liter twin-turbo V8 with 710 horsepower, but has reworked the exterior body panels using procedural-parametric modeling along with 3D prototyping. The result is a completely new front fascia, reprofiled side intakes, and a distinct rear treatment without a window.
Inside, bespoke trims and laser-perforated Alcantara, unique hexagonal stitching patterns, and carbon fiber detailing reflect the owner’s taste. The SP48 demonstrates how Ferrari can take a current production car and reinvent it from the ground up, creating something entirely new without touching the drivetrain.
2021Ferrari BR20
Base: GTC4 Lusso | Classification: Factory SP
The BR20 began life as a GTC4 Lusso before a loyal Ferrari client requested a leaner, two-door GT. Ferrari Engineers removed the rear seats, lengthened the body, and sculpted a sweeping fastback silhouette. The naturally aspirated 6.3-liter V12 produces 681 horsepower, paired with all-wheel drive, but the draw is its bespoke carbon panels and an overall length that is three inches longer than the standard GTC4 Lusso.
Finished in a dark metallic gray with custom cabin details, it’s a throwback to Ferrari’s 1960s coupes, but is modern underneath, and the highlight being the sweeping arches from A-pillar to rear integrated with a rear spoiler. This one-off makes the case that Ferrari’s shooting brake architecture can also be refined into an elegant V12 grand tourer.
2020 Ferrari Omologata
Base: 812 Superfast | Classification: Factory SP
The Omologata showcases Ferrari’s GT racing past into a single aluminum-bodied 812 Superfast. Commissioned by a European client, it features hand-beaten bodywork painted Rosso Magma, with the only two components carried over from the 812 being the windscreen and the headlights.
Its cabin trim references 1960s competition Ferraris. Beneath, the 6.5-liter V12 still delivers 789 horsepower, a dash to 60 mph in under 3.0 seconds, and a 211-mph top speed. However, the appeal lies in the sculpted fenders, vented hood, three horizontal cuts in the surface, integrated rear spoiler for downforce, and heritage-inspired interior touches. It took two years to complete, showing how far Ferrari can go for a one-off. With no sales records, the Omologata remains priceless.
2019 Ferrari P80/C
Base: 488 GT3 | Classification: Factory SP (Track Only)
This radical commission reimagines the 488 GTB as a futuristic prototype-inspired coupe. Built for a private client, the SP80/C adopts an arrow-shaped nose, blade-like side fins, and sculpted carbon aero that draw directly from Ferrari’s endurance racers. The 3.9-liter twin-turbo V8 provides 661 horsepower, driving the rear wheels through a seven-speed dual-clutch gearbox.
Unlike many SP cars that nod to Ferrari’s past, this one points forward, hinting at shapes we’d later see in hypercar studies. Rare even among one-offs, the SP80/C showcases what the Ferrari design team’s efforts yield when given full creative freedom. Highlights include a radical wedge-like front with slim LED lighting, Massive side intakes feeding turbochargers, sculpted flying-buttress roofline, a removable rear wing (can be configured for “exhibition” or “race” setup), and a carbon diffuser spanning the full width of the tail.
2018 Ferrari SP38 Deborah
Base: 488 GTB | Classification: Factory SP
Commissioned by a longtime client with a soft spot for the F40, the SP38 Deborah is a 488 GTB transformed into a wedge-shaped homage. Designed by Flavio Manzoni’s Centro Stile Ferrari and finished in a triple-later metallic red, the slatted engine cover, slim headlights, and aggressive stance all reference Maranello’s 1980s icons like the 308 GTB and F40. Rear fascia features a single light bar with integrated exhausts
Inside, bespoke leather and carbon trim complete the transformation. The drivetrain remains the trusty 3.9-liter twin-turbo V8 with 681 horsepower on offer, topping out at 200+mph. The SP38 illustrates how Special Projects can balance nostalgia with modern performance. While its market value is unknown, collectors would easily peg it in the multi-million-dollar range.
2016 Ferrari SP 275 RW Competizione
Base: F12tdf | Classification: Factory SP
Florida collector Rick Workman commissioned the 275 RW Competizione as a tribute to the 1964 275 GTB Competizione Speciale. Built on the F12tdf chassis, it packs a 6.3-liter V12 pushing 770 horsepower to the rear wheels through a dual-clutch transmission. Painted Giallo Triplo Strato, the car blends retro inspiration with a modern twist.
Designed by the Ferrari Styling Centre in collaboration with Pininfarina, highlights include elongated headlights, triple vents, and aggressive flares, recalling the Le Mans-winning 275s. As one of the few Special Projects based on a track-tuned donor, the SP 275 is both a stylistic homage and a weapon, out on the race track.
2016 Ferrari 458 MM Speciale
Base: 458 Speciale | Classification: Factory SP
Commissioned by a British client, the 458 MM Speciale is a one-off that reimagines Ferrari’s last naturally aspirated V8 mid-engine car. Based on the 458 Speciale, it keeps the 597 horsepower 4.5-liter V8 but wears completely new aluminum bodywork with carbon fiber bumpers and a sharper, more athletic and distinctive front end.
Inspired by the 288 GTO, the redesign was done by Ferrari’s in-house Styling (Centro Stile) under the direction of Flavio Manzon. Highlights include slimmer headlights, a wraparound windshield, and a floating C-pillar that channels air to the engine. Painted Bianco Italia with an Italian tricolore stripe, the MM Speciale combines old-school craftsmanship in the modern performance era.
2015 Ferrari F12 Berlinetta SG50
Base: F12berlinetta | Classification: Tailor Made Special
Unlike client commissions, the SG50 was Ferrari’s gift to Singapore for its 50th anniversary of independence. Based on the 200+ mph F12berlinetta, it retains the 730-horsepower naturally aspirated V12 engine, but wears unique Rosso Singapore paint, with white accents, and SG50 insignia inside.
The interior carries red leather and carbon fiber trim with commemorative badging, with the seats bearing embroidery of the Singapore lion (Merlion motif) on the headrests. Though not as radical as other one-offs on this list, it remains a significant model in Ferrari’s lineage of one-off commissions, which, in this particular case, celebrates a national occasion.
2014 Ferrari SP America
Base: F12berlinetta | Classification: Factory SP
Commissioned for American supermarket chain, CEO Danny Wegma, the SP America is yet another build that reinterprets a modern-day 200 mph F12berlinetta with styling cues that nod back to the legendary Ferrari 250 GTO, with Ferrari’s Special Projects division collaborating with Pininfarina on the design. The car’s red finish combines traditional Ferrari red with subtle detailing unique to this commission.
It features Triple vents on the front fenders, a reshaped grille, and a reprofiled rear with a large diffuser, giving it a distinctive silhouette. The drivetrain remains the F12’s 6.3-liter V12 producing 730 horsepower, mated to a dual-clutch transmission. As a front-engine V12 one-off with 250 GTO DNA, it reflects the American collector’s desire for heritage without sacrificing performance.
2014 Ferrari SP FFX
Base: FF | Classification: Factory SP
Japanese clients have long had a strong link with Ferrari, and the SP FFX seen here is no exception. Based on the FF four-seat grand tourer, Ferrari transformed the shooting-brake into a bespoke coupe with sharper lines and a sleeker roof.
Finished in a striking red paint with white highlights around the grille, mirrors, and the roofline, inspired by Ferrari F1 liveries at the time. Power comes from the FF’s 6.3-liter V12 delivering 651 horsepower, paired with Ferrari’s 4RM all-wheel drive system, the SP FFX showcases how Ferrari is willing to work even with unconventional platforms to create, what is a usable, all-weather one-off with unmistakable presence.
2012 Ferrari SP12 EC
Base: 458 Italia | Classification: Factory SP
Eric Clapton commissioned the SP12 EC as a modern homage to his beloved 512 BB. The car was designed by Ferrari’s Centro Stile in collaboration with Pininfarina and engineers in Maranello. Notable exterior cues borrowed from the 512 BB include horizontal slats or “strakes” in the rear grille, and a front hood opening or air outtake reminiscent of the BB.
Clapton originally wanted Ferrari to install a 12-cylinder, but Maranello convinced him to stick with the V8 for reliability. Built on the 458 Italia platform, the 4.5-liter V8 produces 562 horsepower. Finished in metallic red with Boxer-style black accents, the SP12 EC blends nostalgia with modern-day practicality. It remains one of the best-known one-offs tied to a celebrity.
2011 Ferrari SP30 Arya
Base: 599 GTO | Classification: Factory SP
Indian businessman Cheerag Arya, already a major Ferrari collector, wanted a unique centerpiece. Ferrari delivered the SP30, based on the 599 GTO but incorporating F12 styling cues and the track-oriented 599XX. The 6.0-liter V12 engine produces 661 horsepower and sits under custom bodywork featuring bespoke headlights, a revised grille, and aerodynamic tweaks, including winglets and fins. Carbon fiber elements emphasize exclusivity, while the rear design sets it apart from any production model.
Arya reportedly requested a car that bridged his 599 GTO, with Ferrari’s next era at the time, and the SP30 became just that. Its private ownership and lack of public appearances make it one of the more elusive Special Projects.
2011 Ferrari Superamerica 45
Base: 599 GTB Fiorano | Classification: Factory SP
New York property developer Peter Kalikow marked 45 years since buying his first Ferrari by commissioning the Superamerica 45. Based once again on the 599, more specifically, the SA Aperta, it is finished in Blu Antille with matching wheels and interior trim, and it celebrates Kalikow’s personal taste.
Highlights include a unique rotating carbon-fiber roof that flips 180 degrees into the trunk, a design solution unseen in production, a restyled carbon-fiber trunk to house the roof, brushed aluminum A-pillars, a chrome grille, and custom paint to match Kalikow’s 1961 400 Superamerica. Power comes from the 612-horsepower 6.0-liter V12, with GT comfort retained. The car remains in his collection, highlighting Ferrari’s ability to tailor innovative solutions for individual clients rather than limiting it to series production.
2009 Ferrari P540 Superfast Aperta
Base: 599 GTB Fiorano | Classification: Factory SP
Commissioned by Edward Walson, the son of cable TV pioneer John Walson, the P540 Superfast Aperta pays tribute to a Ferrari that featured in Fellini’s Spirits of the Dead. Based on the 599 GTB Fiorano, it packs a V12 engine that produces 612-horsepower but wears a completely reimagined roadster body finished in a striking metallic gold finish.
Ferrari engineered the car with structural reinforcements (using finite element analysis) to handle the roofless design, keeping performance intact. As one of the earliest Special Projects, the P540 blends cinematic heritage with Ferrari engineering. Its one-off status makes it a unicorn within the already rare 599 family.
2008 Ferrari Fioravanti SP1
Base: F430 | Classification: Factory SP
The SP1 was Ferrari’s first official Special Projects car, commissioned by Japanese collector Junichiro Hiramatsu, the former president of the Ferrari Club of Japan. The body was designed by former Pininfarina designer Leonardo Fioravanti. Using the F430 as a base, but wears a re-bodied form with Enzo-inspired cues and wheels borrowed from a F430 Scuderia.
The headlights, grille, and proportions set it apart, that showed-off Ferrari’s willingness to embrace bespoke commissions. Painted in metallic red, the SP1’s interior was also custom-finished to the owner’s taste. It retains the 4.3-liter V8 that produces 483 horsepower. Though understated compared to later one-offs, its importance lies in being the first of the modern SP era. Today, it’s considered historically significant among Ferrari collectors.
2006 Ferrari 612 Kappa
Base: 612 Scaglietti | Classification: Coachbuilt (Pininfarina)
Commissioned by American collector Peter Kalikow, the 612 Kappa is a true one-off designed and built by Pininfarina. Based on the 612 Scaglietti grand-tourer, it features extensive bespoke bodywork, including a redesigned front bumper, larger grille, new headlights, a sculpted hood, and reshaped rear haunches. The roof panel was made of electrochromic glass that could vary its opacity at the touch of a button, and the cabin was retrimmed in blue and tan leather with custom aluminum switchgear.
Mechanically, it retained the 5.7-liter V12 with 540 horsepower and an F1-style transmission from the standard 612. The car made its debut at the 2006 Concorso d’Eleganza Villa d’Este and remains unique; no other 612 Kappa was built, making it an official one-off coachbuilt Ferrari by Pininfarina, not part of the later “Special Projects” program.
2006 Ferrari P4/5 by Pininfarina
Base: Enzo | Classification: Independent Coachbuilt
Perhaps the most famous one-off, the P4/5 was built for American collector James Glickenhaus. Starting out with an Enzo, Pininfarina re-bodied the car in carbon fiber to evoke Ferrari’s 1960s P-series racers, while aiming to improve aerodynamics and lower overall drag.
While it still packs the same 6.0-liter V12 engine from the Enzo, the bodywork is the highlight: wide, low, and finished with exquisite attention to detail. More than 200 custom parts were developed specifically for this vehicle. Inside, body scans of Glickenhaus and his son were taken for the seat molds. The project cost about $4 million at the time, including the base car. The P4/5 proved that private collectors could influence Ferrari design at the highest level.
1996 Ferrari F50 Bolide
Base: F50 | Classification: Independent Coachbuilt (Pininfarina)
Commissioned by the Sultan of Brunei, the F50 Bolide is a unique, factory-sanctioned prototype developed by Pininfarina and Ferrari’s engineering partners as part of the Sultan’s extensive one-off collection. Based on the standard F50 chassis and drivetrain, it was designed as a more extreme, fully coupe variant of Ferrari’s halo car of the 1990s. The Bolide retained the 4.7-liter naturally aspirated V12 derived from Ferrari’s 1990 Formula 1 engine, making 520 horsepower and mated to a six-speed manual gearbox.
The focus was weight reduction and aerodynamic refinement, with a lowered cowl, wraparound screen, and reworked front and rear body sections crafted in carbon fiber. Other highlights include a roof-scoop and a unique fixed wing. Finished in dark metallic red with unique detailing, it was intended for track or private-estate use only and never homologated for road registration. To date, only one example is known to exist, and it remains in the Brunei royal collection.
1993 Ferrari Conciso
Base: 328 GTS | Classification: Independent Concept (Michalak)
Built by German designer Bernd Michalak, the Conciso is a radical one-off concept based on the Ferrari 328 GTS chassis. Stripping away the roof, windshield, and doors resulted in shaving off nearly 800 pounds (30% less than stock) and giving this open-top vehicle a minimalist, speedster-like/barchetta profile. A highlight of the design is the contrasting black panels that serve as the fenders for the front wheels.
The aluminum body was hand-formed, with an exposed cockpit, seating for two, and a pared-down cockpit focused purely on driving. Power comes from the standard 3.2-liter V8 rated that put out 270 horsepower, paired with a five-speed gated transmission, giving this lightweight mega performance off the line. Displayed at major shows, including Frankfurt and Geneva back in the early 1990s, the Conciso represents a unique build and one that combines Ferrari engineering with avant-garde German styling.
1993 Luigi Colani Testa d’Oro
Base: Testarossa | Classification: Independent Coachbuilt (Lotec/Colani)
German designer Luigi Colani used a Testarossa platform to create the Testa d’Oro, an extreme aerodynamic study built by German engineering heavyweight, Lotec. Colani’s organic design language resulted in flowing lines and dramatic proportions unlike any Ferrari before or since. Though not factory-sanctioned in the same way as later SP cars. Design highlights are, without a doubt, the elongated windshield, deep chin spoiler, and the low-slung stance, all in place for a slippery profile.
Powered by a twin-turbo version of Ferrari’s flat-12, the car produced well over 600 horsepower, although claimed output is 750 horsepower. It set a record at Bonneville, reaching 218 mph in 1991, proving that the wild body was not just for show. The Testa d’Oro was reportedly re-bodied three times between 1989 and 1993 and remains a significant one-off, both as a design experiment and a speed record machine.
1986 Ferrari Testarossa Spider Agnelli
Base: Testarossa | Classification: Factory One-Off
The only official Testarossa Spider ever built by Ferrari was made for the then-Fiat boss, Gianni Agnelli. Finished in silver with contrasting blue highlights, it featured the flat-12 engine, producing 390 horsepower, as standard in the coupe, but required extensive chassis reinforcement to handle the loss of the roof.
A unique folding soft-top and bespoke interior completed the package. Unlike aftermarket conversions, including seven from Pininfarina, this car came directly from Maranello, making it a singular build. It remains in private hands and is considered priceless, as it represents the only sanctioned open-air Testarossa. For Ferrari purists, the Agnelli Spider sits as the definitive one-off of the 1980s.
1972 Ferrari 365 GTB/4 “Daytona” Shooting Brake
Base: 365 GTB/4 | Classification: Coachbuilt (Panther Westwinds)
Built for American importer Luigi Chinetti Jr. and designer Bob Gittleman, this unique Shooting Brake turned Ferrari’s Daytona 375 into a luxury grand tourer unlike anything else from Maranello. Essentially, everything from the A-pillar onward was redone. Panther Westwinds handled the conversion, replacing the fastback body with an elongated glass canopy and dual gullwing rear windows instead of a traditional hatch. The transformation was completed in 1975.
Inside, it features opulent wood trim, rich leather, and bespoke instrumentation that gives it the feel of a gentleman’s lounge. Powered by the same 4.4-liter Colombo V12 that put out 347 horsepower, it remains every bit as fast as it is, a truly eccentric Ferrari elegance reimagined for the 1970s.
