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: 4 Diameter (mm): 258 Height (mm): 26 Thickness (mm): 20 Minimum thickness (mm): 19 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Yearbook LOTUS ECLAT EXCEL 2.2 1982 LOTUS ESPRIT 2.2 172 87-90 LOTUS ESPRIT 2.2 TURBO 215 1987 LOTUS ESPRIT 2.2 TURBO 228 1991 LOTUS ESPRIT 2.2 TURBO 215 87-90 LOTUS ESPRIT 2.2 TURBO 264 89-96 LOTUS EXCEL 2.2 82 -94 TOYOTA CELICA RA61 2.0 82-86 TOYOTA CELICA SUPRA MA61 2.8 81-84 TOYOTA CELICA SUPRA MA61 2.8 84-86