Turbo Groove automotive brake discs have a widened, arcuate gap that increases the flow of cool air, lowering the temperature of the brake pads and brake 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): 41 Thickness (mm): 20 Minimum thickness (mm): 18 Axle application: Front APPLICATION Brand Model Engine Value Power (HP) Year OPEL CORSA (C) 1.0 2000-2001 OPEL CORSA (C) 1.0 2002-2006 OPEL CORSA (C) 1.2 2000-2001 OPEL CORSA (C) 1.2 2002-2006 OPEL CORSA (C) 1.7 D 2000 -2001 VAUXHALL CORSA (C) 1.0 2000-2006 VAUXHALL CORSA (C) 1.2 2000-2006 VAUXHALL CORSA (C) 1.7 D 2000-2001