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): 273 Height (mm): 43 Thickness (mm): 20 Minimum thickness (mm): 18 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year FORD ESCORT (MK5) 2.0 TURBO RS COSWORTH 220 92-95 FORD SIERRA 2.0 TURBO COSWORTH 90-93 GINETTA G33 2.0 TURBO 1991 GINETTA G33 3.9 1991 GRINNALL SCORPION 3 750-1200 92- TVR CHIMAERA 4.0 94-99 TVR CHIMAERA 4.0 94-99 TVR CHIMAERA 4.3 94-97 TVR CHIMAERA 4.3 94-97 TVR CHIMAERA 4.5 97-2004 TVR CHIMAERA 4.5 97-2004 TVR CHIMAERA 5.0 94-98 TVR CHIMAERA 5.0 94-98 TVR GRIFFITH 5.0 93-2002 TVR GRIFFITH 5.0 93-2002