IMSA, Porsche Announce Multi-Year Extension Of Single-Make Series Porsche GT3 Cup Challenge USA by Yokohama To Carry On Under IMSA Sanction Through 2017

March 20, 2015 DAYTONA BEACH, Fla. – The Worldwide Motor Sports Association (IMSA) and Porsche Motorsport The United States today introduced a multi-year extension of the partnership to conduct the…


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