Shelby GT350R-C Takes Its Second Win at 2015 IMSA Continental Tire SportsCar Championship in Lime Rock Posted on August 7, 2015August 7, 2015 by Authcom The Multimatic Ford Shelby GT350R-C took back-to-back IMSA wins and a 1-2 finish. Read more here:: Mustang 360 Posted in Mustang News.