The 917 Kurzheck Coupé (917K) first appeared in 1970 and contributed more to the Porsche 917 story than any other variant. It was a high-down force version that featured a cut-off tail for increased downforce. This reduced the cars top speed, as much as 30 mph, but it helped the Porsche win Le Mans two years in a row.
As the successor to the successful 907 and 908 types, the 917 got an air-cooled twelve-cylinder engine whose power in 1970 was an imposing 580 hp (426 kW) at 8,300 rpms. On June 14, 1970, Porsche bagged the first of 16 overall victories at the 24 Hours of Le Mans. After exactly 2,863.15 miles, or 343 laps, drivers Hans Herrmann and Richard Attwood took the checkered flag in the legendary Porsche 917 Kurzheck (KH) from Porsche Salzburg, with start number 23. When Gérard Larrousse and Willy Kauhsen took second in the Martini-917 Langheck and Rudi Lins and Helmut Marko came in third in the Porsche 908/02, the Porsche sweep of the podium was perfect.