IMSA Prototype Challenge IPCM 2017: Watkins Glen IMSA Radio 4 years ago Race action from the IMSA Prototype Challenge by Mazda, from Watkins Glen. Race 1: http://audio.rpix.org.uk/2017/races/2017_ipcm_wgi_r1.mp3 Race 2: http://audio.rpix.org.uk/2017/races/2017_ipcm_wgi_r2.mp3