Long-time Porsche entrant Theo Koundouris will miss this weekend's Porsche City Index Carrera Cup races after breaking his hand.
Koundouris, currently second in the Elite drivers points standings, will miss the round after injuring his hand in a training incident.
His Porsche is at Phillip Island, but a replacement driver will not been nominated.
Another late change in the grid is the introduction of Jeremy Gray. Grey will make his Carrera Cup debut at Phillip Island, replacing Nathan Tinkler who will miss the round due to business commitments.
This weekend will also be the Porsche championship's first round featuring its new title partner, City Index,
Three races will be held across the L&H 500 weekend, with two races broadcast live on the Seven Network from Phillip Island.
See below for Carrera Cup's pre-Island video