The internationals have taken an early grip on the Bathurst 12 Hour as Audi and BMW traded blows on a shortened practice day at Mount Panorama.
Belgian Frederic Vervisch and Germany's Marco Wittmann set the pace on Friday, with Vervisch recording the fastest opening day lap in Bathurst 12 Hour history.
The final session was cut more than 10 minutes short following a 280km/h crash at the high speed chase involving the Scott Taylor Motorsport Mercedes and Baigent Motorsport BMW M4 GT4.
Vervisch, teaming up with former Supercars Champion Garth Tander and South African Kelvin van der Linde, is making his debut at the event which is part of the Intercontinental GT Challenge.