Kiwi drivers Scott McLaughlin and Shane van Gisbergen have both featured strongly in the fourth round of the 'virtual' Supercars Eseries.
Ford's Cameron Waters claimed overall honours, with three top-five placings in four races held at Montreal's Circuit Gilles Villeneuve and Watkins Glen International Raceway, New York.
The driver of the round winner receives a AU$1000 prize for his charity of choice.
Three podium finishes for McLaughlin saw him remain atop the Eseries standings, 80 points ahead of Waters and van Gisbergen in third.
All four races on Wednesday were won by Holden drivers.
In race one at Montreal, van Gisbergen claimed his fourth win in six races, finishing ahead of Holden driver Anton de Pasquale and Ford's McLaughlin.
In the second race, which began with complete carnage, as almost the entire field was caught up in accidents on the opening corners, Chaz Mostert claimed his maiden Eseries win, ahead of Waters and Holden's Zane Goddard.
In the US opener, de Pasquale emerged triumphant, ahead of McLaughlin and van Gisbergen.
Jamie Whincup completed the round with his first Eseries win, ahead of IndyCar star Alexander Rossi and McLaughlin.
Rossi was one of three wildcard races in the 29-car field, alongside two-time Supercars champion Marcos Ambrose and NASCAR gun Joey Logano.
The next round will take place at Spa-Francorchamps in Belgium and the Nurburgring course in Germany.