Porsche GT3 Cup Challenge Porsche GT3 Cup Challenge 2015: Circuit of the Americas admin 8 years ago Share on Facebook Tweet it Email Coverage of the Porsche GT3 Cup Challenge from the Circuit of the Americas. Race 1: http://audio.rpix.org.uk/2015/races/2015_pgt3_cota_r1.mp3 Race 2: http://audio.rpix.org.uk/2015/races/2015_pgt3_cota_r2.mp3 (Visited 1 times, 1 visits today)