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): 272 Height (mm): 83 Thickness (mm): 10 Minimum thickness (mm): 9 Axle application: Back APPLICATION Brand Model Engine Value Power (HP) Yearbook BMW Z3 1.8 116 95-98 BMW Z3 1.9 140 97-2003 BMW Z3 2.0 150 99-2000 BMW Z3 2.2 170 2000-2003 BMW Z3 2.8 193 97-98 BMW Z3 2.8 193 98-2000 BMW Z3 3.0 231 2000-2003