Porsche's One-Off GT2 RS Goes Full Moby Dick

Porsche has unveiled the Flachbau RS, a single-owner commission that turns a 991.2-generation 911 GT2 RS into a road-legal homage to the 935 'Moby Dick' racing car. The project comes from Porsche's Sonderwunsch individualisation department and was designed by Grant Larson — the same designer behind Porsche's 2018 935 reinterpretation.

The transformation is far more than paint. New lower front wings, extra louvres, a revised front bumper and a three-tier LED lighting arrangement replace the standard front end. Manthey, Porsche's motorsport partner, contributed a front splitter, rear diffuser and a rear wing that can be manually set to three positions; in its high-downforce setting the car generates 554 kg of downforce.

Porsche left the GT2 RS drivetrain untouched, preserving the twin-turbocharged 3.8-litre flat-six's roughly 700 hp, 553 lb ft and 211 mph top speed. Instead the project focused on weight: the Flachbau RS is 31.6 kg lighter than an already Weissach-equipped GT2 RS. Inside, the owner asked for a near-total strip-out — no infotainment, stereo, sound deadening or floor coverings — leaving exposed carbon and metal, plus a wiring harness lightened by deleting wires that were no longer needed.

Finished in Grand Prix White with black contrast elements and aerodisc wheels, the car carries a Nürburgring inscription because Porsche ran a validation prototype for 50 laps around the circuit. Test driver Lars Kern said it stayed 'extremely stable and precise even at very high speeds.'

What the Flachbau RS Reveals About Porsche's Sonderwunsch

Why Porsche's Sonderwunsch Keeps Mining the 935

The Flachbau RS is not a product line; it is a statement about how far Porsche's in-house personalisation arm can push a modern 911 while keeping it road-legal. Using Grant Larson — the designer of the 2018 935 — ties this one-off to a heritage that Porsche has already monetised, but without the compromises of a race-only car.

Manthey's Aero Adds Real Performance, Not Just a Showpiece Look

The adjustable rear wing and revised front splitter/diffuser do more than reference the original long-tail shape. They create a documented 554 kg of downforce, and the 31.6 kg weight reduction should sharpen response despite unchanged engine output. The validation runs at the Nürburgring suggest Porsche treated the car as an engineering exercise, not a styling mock-up.

What the Interior Says About the Customer

The commission was unusually purist: removing the PCM system, audio, sound deadening and floor coverings, then cutting individual wires from the harness, goes beyond typical Sonderwunsch cosmetic work. That kind of request signals a buyer focused on driving feel rather than collectability or resale value.