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): 312 Height (mm): 103 Thickness (mm): 18 Minimum thickness (mm): 16 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year TOYOTA LANDCRUISER VDJ 4.2 D 2006- TOYOTA LANDCRUISER HZJ71 4.2 D 99-2002 TOYOTA LANDCRUISER HZJ74 4.2 D 99-2002 TOYOTA LANDCRUISER HZJ79 4.2 D 99-2006 TOYOTA LANDCRUISER HZJ78 4.2 D 99-2006