Original sentence: During the testing sessions in which sport auto records its "Supertest", the track can not be traveled at full speed past "Tribüne 13" (T13, grandstand 13) in order to allow safe access from the old exit/entrance there
Edited sentence: After lap times were in the 7:40 range until the early 2000s, Wolfgang Kaufmann set 7:32,5 with a Gemballa-Porsche.Challengers even grinded the tread of new road tyres down to the legal limit of 1.6 mm for extra grip, and they stretched limits elsewhere, too, showing up with large aerodynamic aids which normally are not approved by German TÜV (and not even in VLN7/24h races, were the rules are changed annually to keep speeds in check).During the industry testing sessions in which sport auto records its "Supertest", the track can not be traveled at full speed past "Tribüne 13" (T13, grandstand 13) in order to allow safe access from the old exit/entrance there.For many years, this record was held by various Turbo Porsche, of Gemballa and other tuners.He remains the current holder.In April 2004, sport auto editor Horst von Saurma set 7:32,3 in a Porsche Carrera GT, and on 25 Oct 2004, Michael Düchting set 7:18,01 in a Donkervoort RS.Later, Roland Asch spun in an attempt to better this time.On 4 August 2005 Patrick Simon with an Edo Competition Porsche 911 GT2R bettered this with 7.15,6 before in October the Donkervoort of Michael Düchting was 0,7 sec faster.People wondered how approval for all kinds of changes could have been achieved.Saurma was also among the drivers, but mostly racers were hired to squeeze out additional time.Since 1995, the magazine also used to run a lap Nordschleife record challenge for the fastest lap time driven with a car that is road legal, having passed German TÜV and is registered in Germany.Sport auto has announced to introduce rules according to their Hockenheimring-based Tuner GP event, and nobody seems to have made an attempt since.The road legality rule also applies for the tires.The sub-7min time set by the Radical SR8 was not recognized as the car was registered outside of Germany