For the 1975 model year, Porsche introduced the first production turbocharged 911. Although called the 930 Turbo (930 being its internal type number) in Europe, it was marketed as the 930 Turbo Carrera in North America. The body shape incorporated wide wheel-arches to accommodate the wide tires, and a large rear spoiler often known as a "whale tail" on the early cars (modified from the original 1974 IROC design). They were initially fitted with a 3.0-litre engine 260 PS (190 kW; 260 hp) and four-speed gearbox.
Production of the first 400 units qualified the 930 for FIA Group 4 competition, with the racing version called the Porsche 934 of 1976. They participated at Le Mans and other races including battles with the BMW 3.0 CSL "Batmobile". The FIA Group 5 version called Porsche 935 evolved from the 934. Fitted with a slope nose, the 500+ PS car was campaigned in 1976 by the factory, winning the world championship title. Private teams went on to win many races, like Le Mans in 1979, and continued to compete successfully with the car well into the 1980s until the FIA and IMSA rules were changed.