Die-hard Porsche 911 enthusiasts will be breathless with desire, as the Slantnose front design on the 911/991.2 GT2 RS is truly unique—there is only one in the world!
Porsche fans may recall that in May 2025, Porsche registered the names Flachbau and Flachbau RS with the European Patent Office. This dream-level, one-off masterpiece is the reason behind this special Porsche model, built from a 2018 911 GT2 RS (991.2) owned by a customer. Originally already a top-tier sports car, the Porsche Sonderwunsch (Special Wishes) department meticulously reworked it to resemble the legendary 'Moby Dick'—not the fierce giant whale, but Porsche’s most iconic and high-performance Le Mans racing car.
The goal was to reinterpret the iconic 935 model’s look without compromising safety, technology, or street legality. Alexander Fabig, Porsche’s Vice President of Individualization, said this car is fully street-legal!
Behind the design of this one-off car is Grant Larson, who previously designed the 2018 concept version of the 935. Though now retired, Larson described the Flachbau RS as a modern and perfectly balanced reinterpretation of the legendary 935 Moby Dick design.
The Flachbau (Slantnose) front with recessed headlights and the Sonderwunsch special customization program have been part of Porsche’s history for decades. In the 1980s, Porsche famously transformed the 911 Turbo (Type 930) with a slantnose and recessed headlights inspired by the legendary 935 race car, creating an iconic rare model. Converting the powerful 2018 911 GT2 RS (991.2) into a Slantnose shape is no easy task. The car features newly lowered front fenders, added louvres for ventilation, a redesigned front bumper, and an elegant new three-tier LED lighting setup for high beams, low beams, and daytime running lights.
Porsche did not alter the GT2 RS 2018 drivetrain at all, as the factory car already produces nearly 700 horsepower and 750 Nm torque, accelerating 0-100 km/h in 2.8 seconds with a top speed of 340 km/h. Its powerful 3.8-liter flat-six twin-turbo engine is already highly capable, so extracting more power is not a trivial task.
The exterior features a unique one-off 'Grand Prix White' paint with black details, racing stripes, Aerodisc wheel covers, and an interior stripped to the bare essentials. The customer requested Porsche remove the PCM communication system, audio equipment, sound insulation, and all floor coverings. The interior is reduced to painted metal panels and exposed carbon fiber parts, with wiring harnesses deliberately left visible and trimmed to remove unnecessary wires. While some might think just swapping to a lightweight gearshift boot would suffice, Porsche went much further.
Inside, the cabin boasts luxurious embroidery of 'Flachbau RS,' carbon fiber bucket seats, and a Nürburgring track map pattern. This is not mere decoration; Porsche tested one of the three prototype cars by running 50 laps at the Nürburgring Nordschleife. There, test driver Lars Kern confirmed the car maintains exceptional stability and precision even at very high speeds—an impeccable result.
Manthey, Porsche’s trusted partner, participated in this project, resulting in a new front splitter, rear diffuser, enhanced aerodynamics, and a striking thick S-shaped rear wing. The wing can be manually adjusted to three positions depending on desired downforce. This is a Porsche focused seriously on performance, capable of generating up to 554 kilograms of downforce in the highest wing setting. It also weighs 31.6 kilograms less than the base GT2 RS, which itself benefits from the lightweight Weissach Package, making this car impressively light.
Porsche continues its legendary heritage by collaborating with Manthey to create a collectible sports car fully street-legal: the Flachbau RS. Built from a nearly new 2018 Porsche 911 GT2 RS (991.2) Weissach Package, it is a factory one-off engineering marvel. The car comes in special Grand Prix White with matte black U-shaped stripes on the hood and carbon fiber textures, reflecting the iconic 935/78 Moby Dick Le Mans racing car design. The front fenders are fully redesigned and lowered with air pressure relief vents, matching a newly fabricated fuel tank cover and front bumper unique to this car.
The LED headlights are stacked in levels, replacing the original round lights with slim triple LED strips arranged sharply. Aerodynamics are enhanced with a front splitter, underbody canards, rear diffuser, and carbon fiber rear wheel covers (Aero Discs). The elevated S-shaped rear wing, inspired by the 911 GT3 R Rennsport, is adjustable in three steps, raised 5 centimeters higher than before, generating massive downforce of 554 kilograms at 340 km/h on the rear axle.
Of course, the 2018 911 GT2 RS drivetrain remains supremely powerful, but engineers shaved 31.6 kilograms by removing interior convenience features. Nearly everything was stripped out: PCM entertainment system, audio, soundproofing materials, and unnecessary trim panels, exposing Grand Prix White painted metal, carbon fiber parts, and wiring harnesses for a raw motorsport vibe. The carbon bucket seats are embroidered with 'Flachbau RS' and feature the Nordschleife track pattern plus a gold plaque stating Factory One-Off 2026 | Flachbau RS.
This memorable project took about three years, involving wind tunnel testing, CFD simulations, structural validation, and grueling 50 laps on the Nürburgring Nordschleife track, plus over 150,000 kilometers of endurance road testing. This ensured the body and tall rear wing provide the most precise handling stability at all speeds. The Flachbau RS is not just a cosmetic upgrade but a perfectly reimagined legendary engineering feat, fulfilling the ultimate desires of Porsche enthusiasts. Unfortunately, only one exists worldwide, and no further production is planned!