Introduced in 1976, the Porsche 935 was built to Group 5 “silhouette” rules, based on the 930 Turbo street car.  Beginning with the 1977 season, Porsche offered the 935 to customers entering the World Championship for Makes, in the IMSA GT Championship in the US, and the German Deutsche Rennsport Meisterschaft (DRM). The 935 went on to win the 1979 24 Hours of Le Mans overall, and other major endurance races, including Sebring, Daytona, and the Nürburgring 1000km.  The 935 in its various evolutions continued to dominate racing throughout the globe, well into the 1980s.  Today, 935s are a familiar sight at historic racing events around the world.