Turbo Groove automotive brake discs have a widened, arcuate gap that increases the flow of cool air, lowering the temperature of the brake pads and brake 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: Full Number of holes: 5 Diameter (mm): 298 Height (mm): 59 Thickness (mm): 14 Minimum thickness (mm): 13 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year LAND ROVER DEFENDER 110/130 2.2 TD 2011-2016 LAND ROVER DEFENDER 110/130 2.4 TD 2007-2012 LAND ROVER DEFENDER 110/130 2.5 TD 99-2007