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): 314 Height (mm): 59 Thickness (mm): 25 Minimum thickness (mm): 23 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Year AUDI A6 C6 / 4F 2.0 TD 136 2004-2011 AUDI A6 C6 / 4F 2.0 TD 170 2008-2011 AUDI A6 C6 / 4F 2.0 TURBO 170 2005-2011 AUDI A6 C6 / 4F 2.4 177 2004-2011 AUDI A6 QUATTRO C6 / 4F 2.4 177 2004-2011 AUDI A6 QUATTRO AVANT C6 / 4F 2.4 2004-2011 AUDI A6 QUATTRO C6 / 4F 2.7 TD 163 2004-2011 AUDI A6 QUATTRO AVANT C6 / 4F 2.7 TD 163 2004-2011 AUDI A6 C6 / 4F 2.7 TD 163 2004-2011