Porsche revealed a one-off 911 Slantnose, also known as the Flachbau, at the 2026 Monterey Car Week. It’s mechanically based on a 991.2-generation 911 GT2 RS with the Weissach Package from 2018, while the design has been inspired by the 1978 Porsche 935 Le Mans race car called ‘Moby Dick’. The brand claims teams from Weissach and Manthey, alongside its own in-house design studio, motorsport division and the Sonderwunsch (‘special request’ in German) department, took three years to complete this project.

• Gets staggered headlamps, a custom rear wing and unique detailing
• Loses rear seats, infotainment & audio systems and sound-deadening
• Weighs 31.6kg less due to aggressive weight-saving measures
• Claimed top speed is 340kph

Porsche 911 Slantnose exterior

Features a custom Manthey Kit and some elements inspired by the 911 GT3 R rennsport

The silhouette of this Porsche 911 GT2 RS is understandably different due to its Slantnose conversion. The front fascia sports new, staggered LED headlamps that look sleek– the low-beam, high-beam and DRL elements are stacked above one another. These are integrated into the black U-shaped portion around the bonnet, which extends to right above the lowered front fenders. The latter has specially designed vents to prevent the build-up of air pressure in the wheel arches, claims Porsche.

The custom Manthey Kit brings along a redesigned front bumper with small canards on the sides, a new underbody structure, plus a different front splitter and rear diffuser. While the front alloy wheels are of a conventional design, the carbon-fibre aero discs used for the rear units help reduce drag, according to Porsche. The Slantnose gets a large rear wing with S-shaped mounts inspired by the 911 GT3 R rennsport, allowing three manually adjustable positions. At the car’s top speed, Porsche claims that this wing generates 554kg of downforce.

The one-off Slantnose is painted in the brand’s Grand Prix White colour, but gets contrasting black accents and a black finish on the bonnet and roof. Adding more contrast are the black brake callipers and exposed carbon-fibre trim. There are ‘Flachbau RS’ lettering and decals, too, while the Nordschleife is depicted on the rear wing. Since the shape of the front fenders had been altered, the fuel-filler flap and its underlying mechanism also has to be modified, says Porsche. “Our aim was to reinterpret the iconic look of the 935 without compromising on safety, technology or road legality”, Alexander Fabig, Vice President Product Offering & Individualisation at Porsche, said.

Porsche 911 Slantnose interior

The brand has stripped this interior bare of most of its convenience features

Opening the doors will reveal ‘Flachbau RS’ branding on the sills and seat headrests. There’s an outline of the Nordschleife drawn behind the front seats, along with a small gold-coloured plaque mentioning ‘Sonderwunsch’ and ‘Factory One-Off 2026 | Flachbau RS’ on the dashboard. Meanwhile, the interior continues to use the red Alcantara, black leather and exposed carbon-fibre trim originally available in the customer’s 911 GT2 RS.

Saving weight has been another important goal with this one-off Slantnose. To that effect, Porsche says it has removed the rear seats and individual wires, instead opting for simpler protective sheaths to cover newly laid wiring. Generous use of carbon fibre aside, the brand has removed the donor car’s infotainment system, replacing it with a leather-trimmed storage compartment.

Other features to have been deleted include the audio system, floor coverings in the cabin and luggage space, and sound-deadening materials throughout the car. The end result of all these weight-saving measures means that this Slantnose is 31.6kg lighter than the donor vehicle it’s based on.

Porsche 911 Slantnose powertrain and other details

This one-off model retains the donor vehicle’s powertrain setup

Powering this one-off Slantnose is the same 3.8-litre twin-turbocharged six-cylinder engine found in the 991.2-generation 911 GT2 RS. This unit churns out 700hp and 750Nm of torque, and it drives the rear wheels via a 7-speed dual-clutch transmission. The claimed top speed of this one-off 911 is 340kph.

Porsche says that it built three test vehicles for validating data, while aerodynamic calculations being carried out using Computational Fluid Dynamics (CFD) to further optimise the overall design. These prototypes were subjected to multiple wind-tunnel tests, real-world road tests, and 50 laps on the Nurburgring-Nordschleife.

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