 The new Group 5 Sports Cars, together with Group 4 Grand Touring Cars, would contest the FIA's newly renamed World Championship for Makes from 1972 to 1975.From 1976 to 1981 the World Championship for Makes was open to Group 5 Special Production Cars and other production based categories including Group 4 Grand Touring cars and it was during this period that the nearly-invincible Porsche 935 dominated the championship.Prototypes returned in 1976 as Group 6 cars with their own series, the World Championship for Sports Cars, but this was to last only for two seasons (1976-1977).