USRA Modified feature Mason City Motor Speedway 5/7/17
Flag-to-flag coverage of the USRA Modified main event during the Summit USRA Weekly Racing Series from the Mason City Motor Speedway in Mason City, Iowa, on Sunday, May 7, 2017.
Flag-to-flag coverage of the USRA Modified main event during the Summit USRA Weekly Racing Series from the Mason City Motor Speedway in Mason City, Iowa, on Sunday, May 7, 2017.
