Turbo Groove automotive brake discs have a widened, arcuate slit that increases the flow of cool air, lowering the temperature of the brake pads and disc, while draining dust, dirt and hot gases better than a straight line, which can rust and become ineffective. Drilled holes remove surface gases when braking from high speed, while not weakening the structure of the disc as in through drilling. TECHNICAL DATA Type: Drilled and Slotted Full / Ventilated: Ventilated Number of holes: 5 Diameter (mm): 307 Height (mm): 45 Thickness (mm): 24 Minimum thickness (mm): 22 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Year MINI MINI COUNTRYMAN (R60) 1.6 TURBO COOPER S 2010-2017 MINI MINI COUNTRYMAN (R60) 1.6 TURBO COOPER S 2010-2017 MINI MINI COUNTRYMAN (R60) 1.6 TURBO WORKS 2012-2017 MINI MINI PACEMAN (R61) 1.6 TURBO COOPER S 2012-2016 MINI MINI PACEMAN (R61) 1.6 TURBO COOPER S 2012-2016 MINI MINI PACEMAN (R61) 1.6 TURBO WORKS 2012-2016