Here are six things that you should keep an eye on this year.
1) Whincup's future
This time last year, rumours of retirement were quelled when Jamie Whincup announced a one-year extension with Triple Eight.
With four wins in 2020, including a crushing victory in Adelaide, Whincup showed why he's regarded as an all-time great. However, he slipped away in the second half of the year, and ended up fourth overall.
The 2020 championship featured eight different race winners, the most since 2018.
It came amid a season affected by the COVID-19 pandemic, with an amended calendar seeing 27 races hosted at six different circuits.
With three circuits hosting two events (Sydney Motorsport Park, Townsville and The Bend Motorsport Park) teams were able to learn from their mistakes and apply improved performances at the subsequent event.
A tighter midfield will be influenced by a new tyre compound and the return of refuelling, which could encourage more surprise results.
There will be three different Dunlop tyre compounds used throughout 2021, with the new Dunlop Super Soft tyre to be used at the Winton and Darwin events.
All other events will run with regular hard and soft compounds, with Dunlop celebrating its 20th year as the control tyre for Supercars. Additional tyre allocations introduced in 2020 ensures teams have access to new tyres from first practice.
Races will be shaken up further with fuel strategies to be more prominent in 2021, with refuelling to be needed at the three 500km events and the sole enduro, the Repco Bathurst 1000.
5) New driver-team combos
It was a turbulent silly season, with several 2021 line-ups different to the ones which were fielded in 2020.