Turbo Groove automotive brake discs have a widened, arcuate gap that increases the flow of cool air, lowering the temperature of the brake pads and brake 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): 334 Height (mm): 35 Thickness (mm): 32 Minimum thickness (mm): 30 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Year AUDI TT QUATTRO 8N 1.8 TURBO 237 2005-2006 AUDI TT QUATTRO 8N 3.2 250 2003-2006 VOLKSWAGEN GOLF (MK4) 3.2 R32 241 2002-2004