Porsche has revealed a one-off 911 Flachbau RS on the 2026 Monterey Automobile Week. Constructed on the 991.2-generation 911 GT2 RS with the Weissach Package deal, the automobile takes styling cues from the 1978 Porsche 935/78 ‘Moby Dick’ race automobile and was created below the model’s Sonderwunsch customisation programme.
The one-off mannequin combines Grand Prix White with matt black sections and uncovered carbon-fibre components. Porsche says the distinction is meant to reference the Martini-liveried 935/78 “Moby Dick”, notably via the U-shaped design aspect on the entrance. The white paint end was developed particularly for the automobile, utilizing a historic 911 in Grand Prix White from Porsche AG’s assortment as the color reference.
The outside reinterprets the Flachbau physique form of the 935. The entrance wings have been reshaped and now function slatted air retailers designed to vent the wheel arches and cut back air stress. The revised wing profile additionally required adjustments to the gasoline filler flap and its mechanism. The entrance bumper has been redesigned, whereas black flaps equipped by Manthey have been added on the entrance.
The automobile replaces the usual spherical headlights with a lighting system comprising three LED components for the excessive beam, low beam and daytime operating lights, organized vertically. Porsche says the low- and high-beam items measure slightly below 4 centimetres in top, whereas the daytime operating lights are lower than two centimetres tall.
The one-off mannequin is completed in Grand Prix White, a Porsche color first launched on the 911 in 1974, with black contrasting components. The bonnet and roof function an inverted stripe sample in comparison with the usual GT2 RS. The centre stripe and U-shaped entrance distinction aspect are completed in uncovered carbon fibre, whereas the rear-wheel aerodiscs are painted in Grand Prix White. The brake callipers are completed in black.
Aerodynamic adjustments embrace a revised entrance splitter, the Manthey underbody bundle and a rear diffuser. Carbon-fibre aerodiscs on the rear wheels are designed to scale back drag. The rear wing, mounted on S-shaped helps, attracts inspiration from the 911 GT3 R Rennsport (992) and sits round 5 centimetres increased than on the donor automobile.
The rear wing could be manually adjusted to 3 positions to swimsuit completely different monitor necessities. Porsche says rear-axle downforce is 2 to 3 per cent increased than that of a 911 GT2 RS fitted with the Manthey Equipment when the wing is about in comparable positions. In its high-downforce setting, the automobile generates 554 kg of rear-axle downforce at 340 km/h. The wing adjustment system and place markings are patent-protected.
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The inside retains the pink Alcantara, black leather-based and uncovered carbon-fibre end within the entrance part of the cabin, whereas the world behind the seats has been stripped out. The Porsche Communication Administration (PCM) system has been eliminated and changed with a storage compartment, whereas the audio system, sound-deadening materials and far of the ground overlaying have additionally been eliminated as a part of the weight-reduction programme. A number of inside surfaces are completed in Grand Prix White, with chosen areas that includes carbon-fibre trim. The wiring harness has been left uncovered below protecting sheathing, and unused wiring has been eliminated.
The carbon-fibre bucket seats function ‘Flachbau RS’ embroidery on the headrests, together with an overview of the Nurburgring Nordschleife. A dashboard plaque on the passenger facet carries Sonderwunsch branding and the inscription ‘Manufacturing unit One-Off 2026 | Flachbau RS’.
Porsche stated the challenge underwent digital validation earlier than manufacturing started. This included crash simulations, airbag deployment checks, structural evaluation of the rear wing and Computational Fluid Dynamics (CFD) research to evaluate aerodynamic efficiency. Manufacturing tooling for the modified parts was permitted solely after the digital validation course of was accomplished.
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The rear wing was then subjected to vibration testing on a hydropulse rig and static load checks utilizing sandbags. Porsche additionally constructed three check automobiles for additional validation in lighting and wind tunnels, in addition to on-road testing. Growth testing included runs on the Mendig airfield, 50 laps of the Nurburgring Nordschleife and endurance testing at Weissach. Porsche says the programme simulated rear-wing masses equal to round 150,000 km of buyer use.
