One-Off Porsche 911 GT2 Flachbau RS Slantnose

The Porsche 911 GT2 "Flachbau RS" is a single-unit, one-off sports car developed by Porsche's Sonderwunsch personalisation programme. It is based on the 991.2-generation 911 GT2 RS and takes direct design inspiration from the iconic Porsche 935/78 "Moby Dick" racing car. Built specifically for one unnamed client over a three-year period, the vehicle features a completely redesigned front end with vertical LED lighting, a reworked aerodynamic package developed with Manthey, and a weight reduction of approximately 32 kg compared to a standard 911 GT2 RS with the Weissach Package. The car retains the standard GT2 RS powertrain, producing 700 HP and 750 Nm of torque. For Malaysian audiences, this vehicle represents the extreme upper limit of automotive personalisation and collector value, though it is not officially available for purchase through any Malaysian Porsche distributor due to its single-unit production status.

Key Facts

This section provides the core technical and production data for the Porsche 911 GT2 "Flachbau RS" as confirmed by the source material.

The Porsche 911 GT2 "Flachbau RS" produces 700 HP and 750 Nm of torque from its 3.8-litre twin-turbo engine, identical to the standard 911 GT2 RS.

What Is the Inspiration Behind the Flachbau Design?

The Flachbau RS design is a modern interpretation of the Porsche 935/78 "Moby Dick", a legendary racing car known for its elongated bodywork and distinctive aerodynamics. The connection is most obvious in the redesigned front section and the special Grand Prix White paint scheme with U-shaped bonnet graphics.

The 935/78 "Moby Dick" is one of the most iconic racing cars in Porsche history. The Flachbau RS borrows its slantnose profile, which in this modern iteration features three extremely thin vertical LED elements for the headlights instead of the traditional round units. The low beam and high beam are each less than 1.5 inches tall, while the daytime running lights are under 0.8 inches. According to the source, the design "gives the front end a lower and more aggressive look, while also serving as a clear reference to the Porsche 935/78 'Moby Dick'." The U-shaped graphics on the bonnet are derived from the Martini livery elements of the 935/78.

"That design provides a lower and more aggressive face, while also being a clear reference to the Porsche 935/78 'Moby Dick' which was the main source of inspiration for the project."

— Source: Careta, "Porsche 911 GT2 'Flachbau RS' - Slantnose moden, hanya satu unit dibina"

The Flachbau RS is a direct stylistic homage to the Porsche 935/78 "Moby Dick", incorporating the classic slantnose silhouette and Grand Prix White colour into a modern 911 platform.

How Much Weight Was Reduced and How?

The Flachbau RS is approximately 32 kg lighter than a standard 911 GT2 RS equipped with the Weissach Package. This was achieved through the removal of comfort and infotainment systems.

To achieve this weight reduction, Porsche removed the Porsche Communication Management (PCM) system and replaced it with a simple leather-wrapped storage space. The audio system was deleted, and a significant portion of the sound insulation and floor covering was also removed. This approach prioritises driving purity and weight savings over in-car entertainment and comfort.

The one-off Flachbau RS achieves a weight saving of approximately 32 kg over a standard 911 GT2 RS with the Weissach Package by deleting the PCM, audio system, and most sound insulation.

What Are the Key Aerodynamic Changes?

The Flachbau RS features a completely revised aerodynamic package developed with Manthey, including a new front splitter, redesigned underbody, rear diffuser, and a manually adjustable rear spoiler inspired by the 911 GT3 R Rennsport.

The most significant aerodynamic element is the new rear spoiler with S-shaped supports, positioned almost two inches higher than the GT2 RS with the Manthey Kit. It can be manually adjusted to three positions to control downforce levels. At a track speed of approximately 340 km/h, Porsche claims the car generates roughly 554 kg of downforce on the rear axle in the High Downforce setting. At the front, the wheel arches feature louvers on top to expel air from the wheel housings and reduce pressure, while the redesigned front bumper includes finer canards from Manthey.

In its High Downforce setting, the Flachbau RS is claimed to produce approximately 554 kg of downforce on the rear axle at a track speed of around 340 km/h.

Who Is This For in Malaysia?

In Malaysia, the Porsche 911 GT2 "Flachbau RS" is not a practical purchase for the general market; it is a collector-grade vehicle for ultra-high-net-worth individuals (UHNWI). It does not have an official price or a Malaysian distributor due to its one-off status.

The vehicle's relevance to Malaysian users is primarily as a piece of automotive news or a benchmark for Porsche's personalisation capabilities. While the car itself cannot be bought, its existence influences the perception of the Porsche brand among Malaysian enthusiasts. For local context, the car's 700 HP output requires the high-octane fuel available in Malaysia, such as RON 97, and its track-focused setup is best suited for circuits like Sepang International Circuit rather than daily city driving. The removal of the audio system and PCM further cements its purpose as a track-oriented machine, not a luxury cruiser for Malaysian roads.

For Malaysian users, the Flachbau RS is a showcase of Porsche's Sonderwunsch programme's extremes, rather than a vehicle available for local purchase or standard road use.

Common Questions

How long did it take Porsche to build the Flachbau RS?

Porsche took approximately three years to develop and complete the one-off 911 GT2 Flachbau RS. The project involved teams from Porsche, Porsche Motorsport, Weissach, and Manthey throughout the development process.

Is the Flachbau RS lighter than the standard 911 GT2 RS?

Yes, the Flachbau RS is approximately 32 kg lighter than a 911 GT2 RS equipped with the Weissach Package. This was achieved by removing the Porsche Communication Management system, audio system, and most sound insulation.

Will Porsche build another Flachbau RS for another customer?

According to the source, Porsche has stated that even if another customer presents a similar idea, the likelihood of seeing another 911 with the same Flachbau RS design is extremely thin. The project is intended to remain a unique one-off creation.

Sources and Methodology

This article is based exclusively on a single source: "Porsche 911 GT2 'Flachbau RS' - Slantnose moden, hanya satu unit dibina" published by Careta (https://careta.my/article/porsche-911-gt2-flachbau-rs-slantnose-moden-hanya-satu-unit-dibina) on 17-08-2026, written by Danial Yasin Suhaimi.

The source material was originally published in Malay and has been translated into English for this article. Brand names and proper nouns such as Porsche, Sonderwunsch, Manthey, Weissach, and Grand Prix White have been preserved. All technical figures, including power output, weight reduction, downforce, and testing data, are taken directly from the original article. No currency conversions were required as the source did not list a price for the vehicle. This article was last updated on 2026-08-17.