McLaughlin and Mostert both made their Dunlop Super2 Series debuts in 2010 and graduated to the main game three years later.
"The last race, it was tough, I was just [putting in] qualifying lap, qualifying lap, qualifying lap," McLaughlin said.
"Chaz and his team have done a great job, that car is an absolute monster in the races.
"It's quite cool, going back we used to race in Dunlop Series and we always raced V8 Supercars, it's cool to be at the top of our game."
Race wins by Supercars champion over the last decade
2009: Jamie Whincup, 11 from 28 races
2010: James Courtney, five from 26 races
2011: Jamie Whincup, 10 from 28 races
2012: Jamie Whincup, 12 from 30 races
2013: Jamie Whincup, 11 from 36 races
2014: Jamie Whincup, 14 from 38 races
2015: Mark Winterbottom, nine from 36 races
2016: Shane van Gisbergen, eight from 29 races
2017: Jamie Whincup, four from 26 races
2018: Scott McLaughlin, nine from 30 races