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): 240 Height (mm): 58 Thickness (mm): 24 Minimum thickness (mm): 22 Axle application: Front APPLICATION Brand Model Engine Value Power (HP) Year FORD ESCORT (MK3) L 1.6 80-85 FORD ESCORT (MK3) GL 1.6 80-85 FORD ESCORT (MK3) GHIA 1.6 80-85 FORD ESCORT (MK3) 1.6 RS 82-84 FORD ESCORT (MK3 ) 1.6 RS TURBO 84-86 FORD ESCORT (MK3) 1.6 XR3 80-81 FORD ESCORT (MK3) 1.6 XR3I 82-85 FORD ESCORT (MK4) 1.4 86-90 FORD ESCORT (MK4) 1.6 86-90 FORD ESCORT (MK4) 1.6 86-90 FORD ESCORT (MK4) 1.6 XR3I 86-90 FORD ESCORT (MK4) 1.8 D 89-90 FORD ORION 1.3 85-90 FORD ORION 1.4 85-90 FORD ORION 1.6 85-90 FORD ORION 1.6 85-90 FORD ORION 1.6 90-94 FORD ORION 1.8 D 89-90 FORD SIERRA 1.6 82-86 FORD SIERRA 1.6 82-86 FORD SIERRA 1.6 87-91 FORD SIERRA 1.6 87-93 FORD SIERRA 1.6 91-93 FORD SIERRA 1.8 82-87 FORD SIERRA 1.8 87-90 FORD SIERRA 1.8 90-93 FORD SIERRA 1.8 TD 90-93 FORD SIERRA 2.0 82-87 FORD SIERRA 2.0 87-90 FORD SIERRA 2.0 90-93 FORD SIERRA 2.3 82-84 FORD SIERRA 2.3 D 82-87 FORD SIERRA 2.3 D 87-90 PANTHER KALLISTA 1.6 83-90 TVR CHIMAERA 4.0 93-94 TVR CHIMAERA 4.3 93-94 TVR GRIFFITH 4.0 92-2002 TVR GRIFFITH 4.3 92-2002 TVR S 2.8 86-88 TVR S 2.9 89-93 TVR S 3.9 91-93