Porsche Unveils 700-HP One-Off 911 GT2 Flachbau RS, Cutting 70 Pounds

Q: Who is the mystery billionaire that convinced Porsche to spend three years building a street-legal 935 tribute?

The buyer’s identity has not been publicly disclosed. Porsche and the outlets that covered the Flachbau RS consistently describe the customer only as a wealthy collector or owner of the donor 2018 911 GT2 RS, but no credible report names the person. What is known is that the commission came from an owner who already had a like-new 991.2-generation 911 GT2 RS with the Weissach package and wanted Porsche to improve its aerodynamic efficiency while keeping the 700-hp powertrain unchanged. Porsche’s Sonderwunsch division then spent nearly three years, with help from Style Porsche, Weissach engineers, Porsche Motorsport and Manthey, turning it into the road-legal Flachbau RS as a tribute to the 935/78 “Moby Dick.” So the “mystery billionaire” remains just that: a mystery. Reports strongly suggest an ultra-wealthy Porsche collector, but there is no verified public identification, and any specific name would be speculation rather than fact.

Q: Does stripping modern comforts from a 2018 GT2 RS make this exclusive one-off an undrivable road car?

No. Stripping out some modern comforts does not make the Flachbau RS undrivable as a road car; it makes it more extreme, but still usable by design. Porsche says the one-off was engineered specifically to remain road-legal in Europe, and Alexander Fabig, the executive overseeing product individualization, said the goal was to reinterpret the 935 “without compromising on safety, technology or road legality.” The car also went through extensive development over nearly three years, including wind-tunnel and lighting validation, rather than being a show-only styling exercise. What was removed was mainly comfort equipment: the PCM infotainment system, audio hardware, much of the sound deadening, floor coverings, and some unnecessary wiring. That leaves a sparse, noisy, race-style cabin, but not an unusable one. It still retains core road-car functions, including proper high- and low-beam lighting, a PDK gearbox, seats, and a fully intact 700-hp twin-turbo flat-six powertrain from the GT2 RS. In practice, the bigger issue is not basic drivability but how uncompromising it is. The Flachbau RS is lighter by about 70 pounds, more aero-focused, and capable of enormous rear downforce at very high speed. Combined with the already demanding GT2 RS platform, that means it is likely harsh, loud, and intimidating on ordinary roads. So the car is not undrivable; it is simply a road-legal machine built with track-car priorities and collector-car exclusivity ahead of comfort.

3 articles · Updated · Motor1 · Aug 14

Porsche’s latest Sonderwunsch build is a one-off 911 GT2 Flachbau RS developed over three years for a single customer and set to appear at The Quail in Monterey this weekend.
70 pounds were cut from the GT2 RS Weissach donor by stripping out PCM, audio, sound insulation and floor coverings, while keeping the 700-hp twin-turbo 3.8-liter flat-six unchanged at the customer’s request.
935/78 'Moby Dick' cues drive the redesign: new slantnose fenders, ultra-thin stacked LED headlights, a revised bumper, and a higher manually adjustable rear wing that delivers about 1,221 pounds of rear downforce at 211 mph.
50 Nurburgring laps and rear-wing endurance loads equivalent to roughly 93,200 miles were used to validate the road-legal car, which Porsche says will remain a true one-off.