As production of the Type 964 neared its end, Porsche introduced one of the most distinctive and exclusive air-cooled 911s. Built in 1993 and 1994 by Porsche’s Exclusive Department from the final allocation of 964 Turbo chassis, the 911 Turbo 3.6 S Flachbau, or Flatnose, represented the ultimate evolution of the rear-wheel-drive 964 Turbo.
Reviving a theme pioneered by Sonderwunsch-program 930 Turbos of the 1980s, the Flachbau took inspiration from Porsche’s dominant 935 race cars. Its dramatically reworked front end featured exposed pop-up headlights, vented front fenders, and a lower, more purposeful profile. Based on the 911 Turbo 3.6, the Flachbau was produced in three series: X83 for Japan, X84 for Rest of World markets, and X85 for the United States.
All received Porsche Exclusive’s X92 front spoiler, X93 rear spoiler, and X99 rear fender air intakes. Extensively modified and hand-finished by Porsche Exclusive, each reflected the model’s low-volume, coach-built character.
Equally important was the X88 Sport Tuning package, standard on all Turbo 3.6 S models. Inspired by the IMSA engine program developed by Andial and campaigned by Brumos Racing, the M64/50S engine produced 385 hp, 25 hp more than the standard Turbo 3.6. A larger turbocharger, revised cylinder heads, higher-lift camshafts, and a modified intake system provided the additional power, complemented by a front-mounted oil cooler and distinctive four-outlet exhaust.
Power reached the rear wheels through a five-speed G50 transaxle and limited-slip differential, while upgraded brakes, revised suspension, and wider wheels and tires further enhanced performance. Capable of 0–60 mph in approximately four seconds and nearly 180 mph, the Turbo S Flachbau ranked among the fastest production cars of its era. In April 1994, Excellence magazine called it “the fastest-accelerating production Porsche ever built.”
This example is one of 93 Turbo 3.6 S Flachbaus produced and just 39 X85 cars built for the US market. Finished in Guards Red over black leather, it was equipped with electrically adjustable sport seats, a power sunroof, CD changer, and 18-inch Speedline wheels.
Although its earliest ownership is only partially documented, records indicate the car spent its early years in Ohio before joining the collection of Porsche enthusiast Doug Didrick of Naples, Florida. Porsche of Naples records document maintenance during his ownership, including a major 15,000-mile service and related mechanical work in 2006.
By 2017, the Turbo S had joined the collection of George L. Bunting Jr., whose noted assemblage of European sports and grand touring cars later formed the foundation of the BHA Automobile Museum in Maryland. There, the Flachbau was preserved alongside significant Aston Martins, Ferraris, Mercedes-Benzes, and Porsches.
The car has continued to receive careful maintenance, including recent service by Porsche Hunt Valley in Maryland and Porsche Main Line in Pennsylvania. Its CARFAX Vehicle History Report indicates no reported accidents or damage, and the odometer showed just 18,689 miles at the time of cataloguing.
With exceptional rarity, low mileage, documented collector ownership, and the performance of the 385-hp Turbo 3.6 S, this Flachbau ranks among the most desirable air-cooled 911 variants. One of only 39 US-market examples, it is accompanied by its books, tools, spare, jack, and documentation—a fitting final expression of the rear-wheel-drive 964 Turbo.
Above contents © 2026 Gooding Christie’s, reviewed and edited by Rex McAfee , @rexmcafee 🏁
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