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: 4 Diameter (mm): 280 Height (mm): 36 Thickness (mm): 9 Minimum thickness (mm): 8 Axle application: Rear APPLICATION Brand Model Engine Value Power (KM) Year ABARTH 124 SPIDER 1.4 TURBO 170 2016-2019 FIAT 124 SPIDER 1.4 TURBO 140 2016-2019 MAZDA MX5 (MK4) (ND) 2.0 160 2015- MAZDA MX5 (MK4) (ND) 2.0 181 2018- MAZDA MX5 RF 2.0 160 2017- MAZDA MX5 RF 2.0 181 2018-