According to Luca, Pagani offers its customers three types of tires - PZero, PZero Corsa and PZero Trofeo - developed specifically by Pirelli. Pagani asserts they're all homologated for street use, and the more aggressive Trofeo rubber (a modified version of the slicks on the Zonda R) was used for the track run. So there we have it – the tires may have been near racing slicks, but are technically street-legal. Furthermore,
Pagani claims that, after comparing times made on other tracks, the Huayra is capable of going up to two seconds quicker than the time posted.
Maybe the Stig was having an off day.