Another video at Racer Magazine's You Tube page has Brad Kettler confirm that the Laguna Seca Historics car was 605.
Also, there's at least two R8s built up from tubs that weren't raced in period that are running in vintage racing that Audi Sport doesn't officially acknowledge as being raced in period. Which is odd given that at least one R8 was built in 2000 and only used as a show car.
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