The 2018 Porsche Michelin GT3 Cup Challenge Australia Series was an Australian motor racing competition for Porsche 911 GT3 Cup cars.
[1] It was the eleventh running of the Porsche GT3 Cup Challenge Australia.
2017 series winner Jordan Love opted not to defend his title, instead concentrating his efforts on the 2018 Porsche Carrera Cup Australia.
[2] with Daniel Stutterd and Christian Pancione winning the Pro-Am and B classes respectively.
All A class teams used Porsche 911 GT3 Cup Type 997 (MY2010-2012) all B class team used Porsche 911 GT3 Cup Type 997 (MY2006-2009).