After ultimately sitting out 2020 due to the COVID-19 pandemic, this year's opening round was a tough affair, Bargwanna involved in a major last-lap crash due to his Peugeot blowing up a brake rotor.
He only qualified 17th for Round 2 at Phillip Island but, with a progressive grid system, climbed to seventh in Race 1 and fifth in Race 2.
“To come back to GRM with Burson Auto Parts and obviously Ben as my team-mate, it's pretty emotional sort of stuff,” said the older of the two, post-race.
“I've been doing this for a long time but to be able to come back and get one of these [trophy], it's pretty special.
“The guys at GRM worked hard to fix this old girl after Tassie and to come back, and it was a bit of a jet in that last race.
“We were out of the window a bit in qualifying, we managed to work our way to it, and we were catching Chaz, which is always a good thing.”
Bargwanna's triumph was not without a scare of his own, the veteran running off at the end of Gardner Straight on Lap 9 and touring the infield, but that only produced a brief reprieve for Mostert.
“It was going really well then, I was catching Chaz, and then I got up behind him and [experienced] massive aero wash through Turn 1,” he recounted
“It was like ‘Whoa! Here we go, that got my attention.'”
Mostert still leads the series despite finishing a lap down in 18th in Race 3 of the weekend, while Jason Bargwanna is now ninth in the title race.