The three preceding events will feature three races each, taking the four-event total to 11 races.
When drivers cross the line in Race 30 in late November, Sydney Motorsport Park will have hosted its 70th championship race.
The Sydney venue will become just the fourth circuit in ATCC/Supercars history to have hosted 70 or more races.
Just 33 venues have hosted championship races since the category’s inception in 1960.
Perth’s Wanneroo Raceway leads the way with 89 races, just ahead of Tasmania’s Symmons Plains on 87.
Wanneroo Raceway was set to become the first circuit to crack 90 races in 2020 before the event was cancelled due to the effects of the COVID-19 pandemic.
Sandown is third on the list with 79 races, with the Melbourne venue hosting the second round of the 2021 season in March. Series leader Shane van Gisbergen won all three Sandown races.
Sydney Motorsport Park hosted 59 races between 1992 and 2020
Sydney Motorsport Park will leapfrog Darwin's Hidden Valley Raceway (67 races), Winton (66), Oran Park (65) and Phillip Island (62).
Sandown leads the way with rounds hosted; March's Penrite Oil Sandown SuperSprint was the 51st at the circuit.
Symmons Plains have hosted 48 and 42 rounds respectively, with Winton fourth on 32.
Sydney Motorsport Park will draw level with Mount Panorama on 29 championship rounds.
However, Mount Panorama will hit 30 rounds when it hosts December's Repco Bathurst 1000.
Sydney will host night racing four the fourth time