The Commodore Cup was an Australian motor racing series. A one-make series originally devised by Victorian racers Maurie Platt and David Gittus, it was named for the car all competitors were required to use in competition, the Holden Commodore. The first major change to series regulations came in 2004 when VR and VS model Commodores were made eligible. The mechanical package was not changed substantially. The later model cars proved to be faster than the older ones, leading to a drop off in numbers of the older model Commodores.