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: Full Number of holes: 5 Diameter (mm): 269 Height (mm): 56 Thickness (mm): 10 Minimum thickness (mm): 9 Axle application: Rear APPLICATION Brand Model Engine Value Power (KM) Year TOYOTA CELICA ZZT231 1.8 190 2000-2006 TOYOTA CELICA ZZT230 1.8 140 2002-2006 TOYOTA CELICA ZZT230 1.8 140 99-2002