Nor did it have a maximum engine capacity limit although there were weight, dimensional and other restrictions placed on the Group 6 cars.
For 1969 the FIA relaxed a number of Group 6 regulations relating to weight, spare wheel, windscreen height and luggage space requirements.
In 1976, the FIA reintroduced the Group 6 classification, now officially called “Two- Seater Racing Cars”.
[5] From 1979 the FIA decreed that Group 6 cars could compete in the World Championship of Makes qualifying rounds but continued to allow only production-based cars to score championship points for their manufacturer.
[8] For the 1982 World Endurance Championship, the engine capacity maximum for Group 6 cars was set at 3000cc.