The 2021 Repco Supercars Championship will likely host major milestones for both current car models.
The Holden Commodore ZB and Ford Mustang GT, which made their championship debuts in 2018 and 2019 respectively, are both closing on 50 championship race wins.
Shane van Gisbergen's Repco Mt Panorama 500 double moved the Commodore ZB to 42 victories, with Cameron Waters' victory at Tailem Bend last year the Mustang's 37th and most recent race win.
With the 2021 season the last for the iconic Commodore nameplate, the ZB has 29 races remaining this year to crack the half-century before the Chevrolet Camaro ZL1 takes the reins in 2022.
Shane van Gisbergen scored a debut win for the Commodore ZB in 2018
Both models had a quick start to winning life; the Mustang won 15 of its first 16 races, while the Commodore ZB won five of its first six.
Only five models in Australian Touring Car Championship/Supercars Championship history have won 50 or more races.
The ZB's predecessor, the Commodore VF, claimed a record 108 victories between 2013 and 2017. Just behind, the Commodore VE and VE II models combined for 103 wins.
Between 2007 and 2017, the VE and VF models combined for a remarkable 211 victories.
The Commodore VT won 63 races, helping the iconic Commodore nameplate fill the top three spots on the winners' list.
The Ford Falcon FG, which made its debut in 2009, is fourth on 55 victories, ahead of the Falcon BA's 51 wins.
Next in the Commodore ZB and Mustang's sights are the Commodore VX and Falcon FG X, which both recorded 45 victories.
The Mustang must first overtake the Falcon BF, which won 39 races between 2007 and 2008.
Scott McLaughlin helped the Mustang to a debut win in 2019
Van Gisbergen and Scott McLaughlin are the most successful drivers for the Commodore ZB and Mustang respectively.
They both won on the streets of Adelaide on the models' debuts; van Gisbergen in 2018, and McLaughlin 12 months later.
Van Gisbergen has won 18 races in the Commodore ZB, with Red Bull Ampol Racing teammate Jamie Whincup winning 14.
McLaughlin won a staggering 31 races in the Mustang in his reign between 2019 and 2020.
Both models will continue their charges to 50 victories when the championship returns to Victoria for the Penrite Oil Sandown SuperSprint across March 20-21. Tickets are on sale now.
The event will be broadcast live on Foxtel and will be streamed on Kayo. Check out the full TV schedule here.
Championship race win milestones