In the early '80s, the FIA devised a new set of rules for production based race cars that could be used for both track racing and rallying. The Group B rules spawned some of the wildest homologation specials devised at that time. Under the rules, a minimum of 200 production models had to be built (not necessarilly sold) and then evolution specials could be derived from those. Some of the products of Group B were the MG Metro 6R4, Ford RS200, Peugeot 205 Ti16, Ferrari 288 GTO and the Porsche 959.