Porsche 917K — Gulf

The Porsche 917 exists because of a loophole. In 1968, the Commission Sportive Internationale announced that prototype engines would be limited to 3.0 litres, but created a new Group 4 sports car category allowing up to 5.0 litres — provided at least 25 units were built for homologation. Porsche, already developing the 3-litre 908, made the decision to build a second car for Group 4. They constructed 25 chassis in ten months. When the CSI inspectors arrived at Zuffenhausen to verify production, all 25 cars were lined up in the factory. The 917 was homologated.

The first tests were alarming. The 917 wandered under braking and was unstable at high speed. None of Porsche’s regular drivers wanted to race it. The car’s debut at Le Mans in 1969 produced speed — it qualified on the front row — but not reliability. The solution came from John Wyer, the former Aston Martin team manager who had run the Gulf-sponsored Ford GT40s to victory at Le Mans in 1968 and 1969. Porsche offered Wyer seven cars on loan, free parts, and priority on all new developments. Wyer accepted. His engineers redesigned the rear bodywork, creating the Kurzheck — short tail — configuration that solved the stability problem. The 917K was born.

The Porsche 917K’s first race was the 1970 24 Hours of Daytona. John Wyer’s Gulf team finished first and second, breaking the distance record by 190 miles. That season, the 917K won seven World Championship races. At Le Mans, it was the red and white Porsche Salzburg car of Hans Herrmann and Richard Attwood that took Porsche’s first overall victory — not the Gulf cars, all three of which retired. But John Wyer’s operation dominated everywhere else: Brands Hatch, Monza, the Targa Florio, Spa-Francorchamps, Watkins Glen.

The 1971 season was equally devastating. The 917K won six more championship races. The engine, originally 4.5 litres producing 520 horsepower in 1969, had been enlarged through 4.9 litres to a full 5.0 litres producing 630 horsepower. A magnesium-chassied 917K won Le Mans outright. By the end of 1971, Porsche had won every prize available in sports car racing. The FIA then banned Group 5 cars from the World Championship, limiting engines to 3.0 litres for 1972. The 917’s era was over in the championship — though a turbocharged version, the 917/30, would go on to dominate Can-Am so completely that the series collapsed.

Steve McQueen filmed the 917K at Le Mans in 1970. His production company, Solar Productions, used actual race footage alongside dramatised sequences shot on the circuit over the following months. The Gulf-liveried 917K — number 22 — crosses the line first in the film, driven by co-star Christopher Waite as McQueen’s character sacrifices his own chances for a team victory. The film sealed the Gulf 917K’s place in popular culture permanently. The sky blue and orange livery, designed for John Wyer’s team by Gulf Oil, became the most recognised colour scheme in the history of motorsport.

This photograph captures the Porsche 917K in Gulf livery in near-total darkness. A single headlight is illuminated. The blue and orange bodywork emerges from the black. Stacked tyres frame the car. The composition strips away everything except the car itself — no circuit, no crowd, no motion blur. On aluminium, the Gulf blue gains a depth and luminosity impossible to achieve on paper. The orange glows. The darkness holds.