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): 310 Height (mm): 42 Thickness (mm): 22 Minimum thickness (mm): 20 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year AUDI A8 QUATTRO D3 / 4E 3.2 256 2005-2007 AUDI A8 QUATTRO D3 / 4E 4.0 TD 275 2004-2005 AUDI A8 QUATTRO D3 / 4E 4.2 340 2003-2010 AUDI A8 QUATTRO D3 / 4E 4.2 350 2006- 2010 AUDI A8 QUATTRO D3 / 4E 4.2 TWIN TD 326 2005-2010 AUDI A8 QUATTRO D3 / 4E 6.0 W12 450 2003-2005 VOLKSWAGEN PHAETON 3.0 TD 225 2004-2006 VOLKSWAGEN PHAETON 3.0 TD 225 2004-2006 VOLKSWAGEN PHAETON 3.0 TD 233 2007-2008 VOLKSWAGEN PHAETON 3.0 TD 233 2007-2008 VOLKSWAGEN PHAETON 3.0 TD 240 2008-2016 VOLKSWAGEN PHAETON 3.0 TD 240 2008-2016 VOLKSWAGEN PHAETON 3.2 240 2002-2008 VOLKSWAGEN PHAETON 3.6 280 2008-2016 VOLKSWAGEN PHAETON 3.6 280 2008-2016 VOLKSWAGEN PHAETON 3.6 280 2008-2016 VOLKSWAGEN PHAETON 3.6 280 2008-2016 -2016 VOLKSWAGEN PHAETON 5.0 TD 313 2004-2007 VOLKSWAGEN PHAETON 6.0 W12 420 2002-2005 VOLKSWAGEN PHAETON 6.0 W 12 450 2005-2012