Ringshausen raced an Mk2 RS1600 (a car which did not really exist - a 1599 16-valve engine - a homologation wonder...) in group 5 national. It looked as a 1976-group 2 from the outside.
He raced a 1300 cc BDA in 1977 (Sekurit pokal) but also a 2-litre Group 5 car - make of that what you want...
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