Prodrive Racing Australia’s Cameron Waters topped the first of the co-driver practice sessions for the Sandown 500, holding out Chris Pither and Steve Owen.
The trio staged a frantic battle for top spot in the last 120 seconds of the session, with all three drivers hitting P1 at some point as the clock counted down.
When the music stopped, however, it was Waters who had the best seat in the house, a cracking 1m09.906s on his final lap giving him P1 by an impressive 0.210s.
Pither wound up second in the #34 Volvo, while Owen ended the session third fastest in the #5 Prodrive car, having been fastest with just over a minute to go.
Paul Dumbrell was fourth fastest in the Jamie Whincup Commodore, having provided a rare highlight from a straightforward session by running wide at Turn 1 mid-way through.
Jono Webb was fifth in the Tekno car, while Dean Canto made it three PRA cars in the top six.
One of the more impressive efforts of the session was that of Karl Reindler, who was seventh quickest in the LD Motorsport entry, ahead of the Walkinshaw cars of Warren Luff and Tony D’Alberto.
Marcos Ambrose rounded out the Top 10.
David Russell was the best of Nissans in P11, with Alex Davison the best Erebus entry down in 16th.
In terms of the international drivers, former full-time V8 driver Alex Premat led the way in the #33 Volvo in 14th place, less than half a tenth clear of Sandown rookie Sebastien Bourdais in the #18 Commodore.
Brits Oliver Gavin (#222 Commodore) and Alex Buncombe (#7 Nissan) were were 19th and 20th fastest respectively.