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): 302 Height (mm): 42 Thickness (mm): 12 Minimum thickness (mm): 10 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year AUDI A6 ALLROAD QUATTRO C6 2.7 TD 2006-2012 AUDI A6 ALLROAD QUATTRO C6 3.0 TD 2006-2012 AUDI A6 ALLROAD QUATTRO C6 3.2 255 2006-2010 AUDI A6 ALLROAD QUATTRO C6 4.2 350 2006-2010