From 935 Race Car to a One-Off 911 GT2 RS
Porsche's Sonderwunsch division has revealed the Flachbau RS, a one-off 911 GT2 RS that combines the modern track-focused platform with the slant-nose silhouette of the legendary 935 race car. It is the second complete factory one-off produced since Sonderwunsch became its own business unit in 2021, following a 993-generation 911 Speedster shown at The Quail in 2024.
The commission began with the owner's 2018 991.2-generation 911 GT2 RS equipped with the Weissach package. Rather than asking for more power, the owner wanted the car to be more aerodynamically efficient and lighter while keeping its output and torque unchanged. Porsche's response channels the work of engineer Norbert Singer, who designed the original 935's long hood and hidden headlamps.
Modern road-car rules shaped some of the details. Because headlamps must meet a 50-centimeter height requirement, Porsche retained only the original bumper lamp and added low- and high-beam lighting in what appear as louvers above the front wheels. Rear-facing vents help release high-pressure air from the wheelhouses, reinforcing that the changes are functional rather than purely decorative.
The original slant-nose 935 emerged from a loosely written FIA Group 5 rule that left fender shape free. The car became one of the most successful customer GT racers and was nicknamed Moby Dick for its width, white paint and whale tail. Porsche later built road-going slant-nose 911s after Mansour Ojjeh asked for a luxury road version, making the Flachbau RS a direct tribute to that Sonderwunsch origin story.
What the Flachbau RS Reveals About Porsche's Bespoke Strategy
Why the Moby Dick Link Is More Than a Paint Scheme
The Flachbau RS draws on a specific aerodynamic advantage from Porsche's racing past. FIA Group 5 rules allowed substantially wider tires but also left fender shape free, and Singer used that opening to extend the hood's slope to the outer edges and move the lights into the spoiler. The benefit was a cleaner front-end airflow and more speed on the Mulsanne Straight at Le Mans. In the new one-off, the same philosophy appears in the louver-style lighting and wheelhouse vents, which suggests the bodywork is intended to manage air rather than just recall a famous look.
What This Build Tells Us About Sonderwunsch's Role
Porsche is presenting the Flachbau RS as its second factory one-off under the modern Sonderwunsch business unit. Like the 993 Speedster before it, the car turns heritage into a custom commission that can be displayed at a high-profile collector event such as Monterey Car Week. The brief is also revealing: the owner wanted better aerodynamics and efficiency without changing power or torque. That points to a customer who values engineering detail and provenance over a headline output figure, which is precisely the type of buyer a factory bespoke program is designed to serve.
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