Low single-digit temperatures greeted the sphere for the primary of two half-hour apply periods on the Launceston circuit.
A lot of the early motion got here on the very first runs, Cam Waters bursting out of the blocks with a 51.257s.
That point would stay because the benchmark till a lot later within the session as the sphere settled into longer runs.
As normal the flip 4 hairpin proved problematic for quite a lot of drivers, Kostecki the primary to overshoot the braking marker and have to make a three-point flip.
The likes of Andre Heimgartner, Scott Pye and Bryce Fullwood would later do the identical.
It wasn’t till the ultimate minute that the Waters time was bettered as quite a lot of drivers switched to inexperienced tyres.
One of the best of the late improver was Kostecki who jumped greater than a tenth away from the sphere with a 51.014s.
“I learnt tips on how to discover reverse within the session,” joked the Erebus driver. “The automotive feels fairly balanced. I am unsure what number of guys ran greens, but it surely’s begin to the [weekend] right here in Tassie.”
James Courtney ended up second quickest with a 51.163s whereas Todd Hazelwood made up 18 spots on his remaining lap to finish up third.
Will Davison jumped Waters on his remaining lap, whereas Waters, who did not enhance on that early time, was shuffled again to fifth.
Will Brown was sixth quickest in his Erebus Camaro forward of Shane van Gisbergen and Mark Winterbottom.
Jack Smith was ninth for Brad Jones Racing with Broc Feeney tenth.
Observe continues with the second 30-minute session at 10:55am native time.
Tasmania SuperSprint apply 1 outcomes