The race got off to a dramatic start when front-row starter Thomas Randle stalled on the line.
As the field scrambled to get past the stricken Castrol Ford, Andre Heimgartner was caught by surprise, smacking square into Randle's right rear quarter.
The high-speed impact not only destroyed both Randle and Heimgartner's cars, but also meant Randle clipped Nick Percat as he tried to sneak by on the outside.
Thankfully all three drivers emerged from their wrecked cars without any serious injuries.
The race was red-flagged while the crashed cars were cleared, before a full standing restart.
The winner from the restart was Mostert, who fired from the outside of the third row to the lead with a bold move up the inside of Turn 1.
James Courtney made a smart start as well to move into second, while polesitter Cam Waters was shuffled back to fifth, behind Anton De Pasquale and Shane van Gisbergen, on the opening lap.
Courtney and De Pasquale were the first of the lead group to pit, each taking their mandatory service on Lap 5.
Mostert then surrendered the lead to cover those cars by stopping a lap later, resuming ahead of both Courtney and De Pasquale.
Waters waited until Lap 11 to make his stop, popping back out between Courtney and De Pasquale in what was effectively fourth place.
Like yesterday van Gisbergen ran long, not taking his stop until Lap 16.
He was able to resume comfortably clear of Mostert and Courtney, before cruising through the next two laps to take a time certain chequered flag.
"It's a shame to see that crash at the start, I'm glad those guys are okay," said van Gisbergen.
"The restart, I didn't get a good start again. We had an awesome race back through. I couldn't believe it when this guys pitted and I got clear air. We were planning to do the undercut then, but they did it an we got clear air. It worked out really well."
Mostert and Courtney were second and third ahead of Waters and De Pasquale.
Broc Feeney finished sixth while Will Brown was the best of the Erebus cars in seventh.
David Reynolds finished eighth, Mark Winterbottom ninth and Bryce Fullwood 10th.
Jordan Boys was the best of the wildcards in a credible 11th while Will Davison recovered from 23rd on the grid, and a spin on the restart lap, to finish 13th.
The Bend SuperSprint continues with Race 3 at 3:40pm local time.
The Bend SuperSprint Race 2 results
|1||97||Shane van Gisbergen||Holden Commodore ZB|
|2||25||Chaz Mostert||Holden Commodore ZB|
|3||5||James Courtney||Ford Mustang GT|
|4||6||Cameron Waters||Ford Mustang GT|
|5||11||Anton De Pasquale||Ford Mustang GT|
|6||88||Broc Feeney||Holden Commodore ZB|
|7||9||Will Brown||Holden Commodore ZB|
|8||26||David Reynolds||Ford Mustang GT|
|9||18||Mark Winterbottom||Holden Commodore ZB|
|10||14||Bryce Fullwood||Holden Commodore ZB|
|11||49||Jordan Boys||Holden Commodore ZB|
|12||22||Chris Pither||Holden Commodore ZB|
|13||17||Will Davison||Ford Mustang GT|
|14||96||Macauley Jones||Holden Commodore ZB|
|15||34||Jack Le Brocq||Holden Commodore ZB|
|16||3||Tim Slade||Ford Mustang GT|
|17||35||Todd Hazelwood||Holden Commodore ZB|
|18||56||Jake Kostecki||Ford Mustang GT|
|19||78||Zak Best||Holden Commodore ZB|
|20||20||Scott Pye||Holden Commodore ZB|
|21||4||Jack Smith||Holden Commodore ZB|
|22||10||Lee Holdsworth||Ford Mustang GT|
|23||31||James Golding||Holden Commodore ZB|
|24||99||Brodie Kostecki||Holden Commodore ZB|
|55||Thomas Randle||Ford Mustang GT|
|8||Andre Heimgartner||Holden Commodore ZB|
|2||Nick Percat||Holden Commodore ZB|
|View full results|