IMSA Prototype Challenge by Mazda: Sebring 2017 IMSA Prototype Challenge by Mazda - March 16, 2017March 18, 2017 A new championship for North America in 2017, and this is the series debut. Commentary from Jim Roller and Shea Adam. Race 1: http://audio.rpix.org.uk/2017/races/2017_ipcm_sebring_r1.mp3 Race 2: http://audio.rpix.org.uk/2017/races/2017_ipcm_sebring_r2.mp3
