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): 285 Height (mm): 40 Thickness (mm): 22 Minimum thickness (mm): 20 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Year ALFA ROMEO GTV 1.8 144 98-2000 ALFA ROMEO GTV 2.0 95-96 ALFA ROMEO GTV 2.0 96-2003 ALFA ROMEO SPIDER 1.75 98-2000 ALFA ROMEO SPIDER 2.0 2003-2006 ALFA ROMEO SPIDER 2.0 96-2003 ALFA ROMEO SPIDER 2.0 TURBO 95-2001