lead until a suspension failure led to retirement. World Sportscar Championship victories Individual production and race history In 1969–71 production consisted of 43 naturally aspirated cars (36 K, 5 LH and 2 Spyders) and 16 turbocharged (13 917/10 and 3 917/30), for a total of 59 917s built. The table below summaries the racing history of each chassis. Multiple winners have each win listed, but otherwise only the best result for each chassis is mentioned. Other uses On 9 August 1975, Porsche and Penske would give the Can-Am car its final send off in style, when they took their 917/30 to Talladega to break the FIA speed record on a closed circuit. With Mark Donohue driving, the average speed reached was . As well as being the last official outing for the 917, it was the last major accomplishment for Donohue before his fatal accident in practice for the Austrian Grand Prix a week later. The record would stand until 1980. Several 917 coupés as well as 917/10s (powered by turbos or NA engines) were run in Europe's Interserie until the mid-1970s. Many 917 leftover parts, especially chassis, suspension and brake components, would be used to build the Porsche 936 in 1976. Despite the car's impracticality, at least three 917s were road-registered: Count Gregorio Rossi di Montelera of the Martini company, bought chassis 030 from Porsche. He raced it once under the Martini Racing Team Flag at the Zeltweg 1000 km World Championship race on 27 June 1971. After the race, it was returned to the factory, where it was modified with basic road equipment (exterior mirrors, turn signals, exhaust system and comfort modifications) and painted silver. None of the European authorities would certify the car for road use and Rossi obtained the Alabama plate 61-27737 to circumvent the problems. The second, for Joachim Grossmann, was painted white and given the German registration CW-K 917. The Danish car magazine Bilen in a 1977 article details how Grossmann bought the frame and other components in 1975 for 20,000 DM, rebuilt it and then modified it (examples: turn signals, hand brake, Safety glass windows and some modifications to the exhaust system) to satisfy German safety inspectors leading to the registration. Claudio Roddaro was able to register another original 917 that was modified for the road, in Monaco in 2016. Chassis number 037 was accepted based upon the precedent of Count Rossi's road