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: 5 Diameter (mm): 290 Height (mm): 68 Thickness (mm): 18 Minimum thickness (mm): 16 Axle application: Back APPLICATION Brand Model Engine Value Power (KM) Year SUBARU IMPREZA 2.0 TURBO WRX 2001-2005 SUBARU IMPREZA GB270 2.5 TURBO 2007-2008 SUBARU IMPREZA 2.5 TURBO WRX 2005-2007 SUBARU LEGACY BE5 2.0 TWIN TURBO 280 99-2003 SUBARU LEGACY BH5 2.0 TWIN TURBO GT-B 280 99-2003 SUBARU LEGACY BH5 2.0 TWIN TURBO GT-B 260 99-2003