The 2003 Australian Nations Cup Championship was a CAMS sanctioned motor racing title[1] for drivers of GT sports cars[2] complying with Group 2E Nations Cup regulations.[3] The championship, which was managed by Procar Australia as part of the 2003 Procar Championship Series,[4] was the fourth Australian Nations Cup Championship.[5] The title was won by Paul Stokell driving a Lamborghini Diablo GTR.