Mark Winterbottom edged out Prodrive team-mate Chaz Mostert in the final pre-qualifying practice session for the Sandown 500.
The pair both set their fastest times right at the end of the session, Mostert going fastest first with a 1m08.924s, before Winterbottom stole P1 with a 1m08.874s at the flag.
Jamie Whincup ended up third fastest, having gone top – and first under the 1m09s mark – with 11 minutes of the 40-minute session.
At that point he displaced in-form Scott Pye from P1, the DJR Team Penske driver going on to finish the session fourth fastest.
Jack Perkins was impressively quick in the #22 Holden Racing Team Commodore, setting the fifth fastest time ahead of David Reynolds (Prodrive Ford), Shane van Gisbergen (Tekno Holden) and Scott McLaughlin (Volvo).