Corvette C7.Rs already have won at Le Mans, Daytona and Sebring in 2015 • Gavin, Milner enter off
thrilling class victory at 24 Hours of Le Mans • Garcia, Magnussen back to defend Watkins Glen race victory from 2014 • Two Corvettes sit 1 - 2 in Tequila Patrón North American Endurance Cup GTLM standings