Matt Stone Racing has taken the covers off the two cars Jake Kostecki and Zane Goddard will steer in 2021.
The 2021 Repco Supercars Championship will see both drivers complete full seasons in the main game.
In 2020, Kostecki and Goddard completed a SuperLite programme, sharing the #34 entry across the single-driver events.
They later teamed up for the only enduro of the season at Bathurst.
Goddard has shifted to the #35 YellowCover entry, which was raced last season by Garry Jacobson.
Jacobson has shifted to Team Sydney, joining Fabian Coulthard in an all-new line-up.
Goddard, 21, impressed last season and recorded a best finish of 10th at Sydney Motorsport Park.
Kostecki, 21, is the youngest driver on the 24-car grid in 2021, and will steer the UNIT-backed #34 Commodore.
The only driver born in the 21st century, Kostecki made his main game debut as a 19-year-old alongside cousin Brodie at the 2019 Bathurst 1000.
He recorded a best finish of 14th in Darwin last season.
The team has also undergone an engineering restructure, with Kostecki's entry to be skippered by the experienced Tim Newton.
Jack Bellotti, who was the data engineer on the #34 last season, will engineer Goddard's #35 entry.
The two drivers will run at the pre-season test at Queensland Raceway on Friday.
The 2021 Repco Supercars Championship will commence at the Repco Mt Panorama 500. Tickets are on sale now.