Kostecki needed to out-last a race-long assault from Randle, the hole between the pair barely getting over a second.
On the similar time, he was complaining about dealing with points along with his Erebus Camaro.
However he was capable of do sufficient to win the race and prolong his championship lead over Shane van Gisbergen to 111 factors.
Kostecki made a lightning begin from the skin of the entrance row, which allowed him to get barely forward of Randle on the run to show 1.
Randle did handle to get again forward on the best way into the nook however conceded the result in Kostecki because the observe swung left at flip 2.
Behind the lead group there was drama at Flip 6 when Jack Le Brocq acquired into the facet of Cam Waters as they argued over eleventh place. They then collected Tenth-placed Will Davison, with the trio ending up in a synchronised spin.
Davison was capable of proceed, albeit behind the sphere, whereas Waters and Le Brocq had been each pressured into the pits for repairs. Waters misplaced a lap, Le Brocq three laps.
Again on the entrance, Kostecki led Randle throughout the primary stint. He could not draw back, although, Randle hanging inside a second of the chief earlier than taking his necessary cease on lap 8.
Kostecki coated Randle’s cease the next lap, resuming with an unchanged lead.
It was the identical story throughout the second stint, Randle stalking Kostecki on the head of the sphere.
To complicate issues, Kostecki was additionally left battling a bizarre feeling by way of the steering. Kostecki did not blink, although, the collection chief crossing the road a second forward of Randle.
“I do not know, it felt actually unusual [compared to] yesterday and I could not brake in a straight line. The automobile was wandering round a good bit. It was fairly scary the final 10 laps there, I am joyful to have sufficient automobile velocity to remain in entrance of Tom there.
The battle for third was a thriller, largely because of an early cease for David Reynolds. The undercut helped him from fifth to 3rd, though meant he would at all times face an uphill battle with grip late within the race.
He did handle to hold onto the spot till the dying laps when van Gisbergen made a transfer at flip 6. Nonetheless, he locked a brake, ran a bit broad and left the door open for Chaz Mostert to take over fourth.
Mostert then ran down Reynolds, easing into third place at flip 1 on the final lap.
Van Gisbergen, in the meantime, got here beneath fireplace from Matt Payne on the ultimate lap however was capable of grasp on to fifth place.
Title contender Will Brown had been within the battle for ninth with Feeney however was shuffled again to thirteenth late within the race.
Supercars The Bend Race Two outcomes