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: 4T Diameter (mm): 213 Height (mm): 61 Thickness (mm): 10 Minimum thickness (mm): 8 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Vintage AUSTIN MINI 1000 74-92 AUSTIN MINI 1100 75-83 AUSTIN MINI 1275 GT 74-80 AUSTIN MINI-MOKE 80-93 MORRIS MINI 1000 74-92 MORRIS MINI 1100 75-83 MORRIS MINI 1275 GT 74- 80 MORRIS MINI-MOKE 80-93 ROVER MINI 1.0 90-92 ROVER MINI 1.3 90-2000