The debut of nine new hybrid-powered prototypes in the reborn top class of Grand Touring Prototype (GTP) serves as the headliner for a stacked 61-car field set to contest the 61st edition of the January endurance classic.
The debut of nine new hybrid-powered prototypes in the reborn top class of Grand Touring Prototype (GTP) serves as the headliner for a stacked 61-car field set to contest the 61st edition of the January endurance classic.