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): 269 Height (mm): 46 Thickness (mm): 22 Minimum thickness (mm): 20 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year AUDI A8 QUATTRO D2 / 4D 2.5 TD 180 2000-2002 AUDI A8 QUATTRO D2 / 4D 2.5 TD 150 98-2000 AUDI A8 D2 / 4D 2.5 TD 98-2002 AUDI A8 QUATTRO D2 / 4D 2.8 2001-2002 AUDI A8 D2 / 4D 2.8 98-2002 AUDI A8 QUATTRO D2 / 4D 3.3 TD 225 2000-2002 AUDI A8 QUATTRO D2 / 4D 3.7 280 99-2002 AUDI A8 QUATTRO D2 / 4D 4.2 98-2002 AUDI A8 QUATTRO D2 / 4D 6.0 W12 420 2001-2002 AUDI A8 QUATTRO D2 / 4D 6.0 W12 420 2001-2002