The 2 title contenders began the 42-lapper side-by-side on the entrance row, Kostecki getting the most effective of the run to Flip 1 from the surface to brush into the lead forward of van Gisbergen and David Reynolds.
The main trio then continued to run in that order throughout a reasonably tame first stint, Kostecki’s benefit sitting at round half a second.
That was till the tip of lap 17 when van Gisbergen made his transfer, forcing Kostecki to the within on the run to Flip 7. The Kiwi was then in a position to get a greater run onto the entrance straight and ease previous Kostecki into Flip 1.
Kostecki did not hand over, barging down he within van Gisbergen into Flip 7 on the very subsequent lap – solely to pit instantly after reclaiming the lead.
The squabble proved pricey, although, with Reynolds – who had pitted on lap 17 – in a position to undercut Kostecki.
The pair then battled over what would change into the efficient lead till Kostecki was in a position to sneak again by way of at Flip 7.
Van Gisbergen, in the meantime, stayed out till lap 28 earlier than resuming in what was successfully fourth behind Kostecki, Reynolds and James Courtney.
He did have higher tyre situation, although, and inside a handful of laps was in a position to clear each Courtney and Reynolds.
He then set about working down Kostecki’s two-second lead, the battle coming to a head 13 laps from residence.
Shane van Gisbergen, Triple Eight Race Engineering, Chevrolet Camaro
Photograph by: Edge Photographics
It was at that time that van Gisbergen bought a run down the again straight, forcing Kostecki to defend into Flip 7. Kostecki then continued to defend staunchly, the pair making contact plenty of instances over the laps that adopted.
Kostecki was ultimately proven the dangerous sportsmanship flag for his defence, at which level van Gisbergen was in a position to squeeze previous at Flip 6.
That was all he wanted to safe victory by 0.5s over Kostecki.
“I hope everybody loved that, that was actually cool,” mentioned van Gisbergen. “I bought a nasty begin after which I knew my automobile was good, however could not fairly get by way of.
“We had an superior battle within the center however we have been dropping time to the fellows that pitted. The cease was superior and I drove by way of to catch these guys. That was actually, actually cool.”
Kostecki added: “That was numerous enjoyable within the automobile. To return off second finest just isn’t preferrred, however we gave it a crack. It was a very good race with Shane. We’ll see what we are able to do tomorrow.”
Reynolds completed third, lower than a second behind van Gisbergen having been introduced again into competition by the battle for the lead.
Todd Hazelwood put in a formidable drive to complete fourth, a late cease serving to him run down Courtney.
Chaz Mostert made some floor from his tough qualifying session, however nonetheless needed to accept eleventh.
Kostecki continues to guide the sequence over Mostert, the hole now at 76 factors, whereas van Gisbergen sits third, 78 factors in arrears.
The Perth SuperSprint continues with two qualifying periods and two races on Sunday.
Supercars Perth – Race 1 outcomes (42 laps)