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): 358 Height (mm): 74 Thickness (mm): 28 Minimum thickness (mm): 26 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year AUDI Q7 4L 3.0 SUPERCHARGED 2010-2015 AUDI Q7 4L 3.0 TD 2006-2015 AUDI Q7 4L 3.6 2006-2011 AUDI Q7 4L 4.2 2006-2011 AUDI Q7 4L 4.2 TD 2007-2015 AUDI Q7 4L 6.0 TWIN TD 2008-2015 PORSCHE CAYENNE (9PA) 4.5 2003-2007 PORSCHE CAYENNE (9PA) 4.5 TWIN TURBO 450 2003-2007