Supercars champion Scott McLaughlin has made a fast start to Saturday's action in Perth, topping the timesheets in final practice.
The DJR Team Penske ace, who finished second behind teammate Fabian Coulthard in Friday's race, posted a 53.3841 seconds fastest lap in the half-hour session at Barbagallo Raceway.
Holden's Jamie Whincup (53.4650) was second quickest ahead of Ford's Chaz Mostert (53.6100) and teammate Shane Van Gisbergen (53.6262).
McLaughlin was consistently fast throughout the session but also went off the track at one point and took a trip through the sand at turn one in a rare misstep.