By early 1971, the Nordschleife track had been resurfaced, several bumps and jumps (e. g. "Brünnchen") had been removed, and the hedges had been replaced by Armco barriers. As a result, the track became even faster, with sportscars setting new track records before Formula One returned. The Südschleife was not updated and abandoned after 1971. Formula One held its last Grand Prix on the Nordschleife in 1976, the last Motorcycle Grand Prix there was in 1980. Due to aerodynamic advance, Formula Two in almost equalled the record set by Formula One in 1975, and even turbo-powered touring cars came very close.