Feeney made a good getaway from pole, initially leading the race from fellow front-row starter Lostecki.
The series leader only last three laps in second place, though, until teammate Brown eased past at the last corner.
The trio ran in that order until lap 20 when Kostecki was first to hit the lane.
He re-emerged behind an early stopping Tim Slade, who had taken his service from fifth place on lap 11.
Brown waited until lap 24 to take his stop, he too coming back out behind Slade.
The Erebus Camaros were able to clear Slade by lap 29, at which point Feeney came in for his stop.
The squabble behind helped to him have enough gap to come out with his lead intact and a 2.5-second margin over the two Erebus entries.
Source: Autosport