Optimum Motorsport underlined its considerable endurance racing pedigree bringing home their third victory in the season-opening Hankook Tyres 24 Hours of Dubai today (14 January, 2017) with the Ginetta G55 in the SP3 Class for GT4 machinery. The Ginetta G55 battled at the front from the start of the race, after serving a 4 minute penalty in the pits for …