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: 3 Diameter (mm): 280 Height (mm): 39 Thickness (mm): 9 Minimum thickness (mm): 8 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Year SMART CITY-CABRIO 0.6 TURBO 2000-2002 SMART CITY-CABRIO 0.7 TURBO 2002-2004 SMART CITY-CABRIO 0.8 TD 2001-2004 SMART CITY-COUPE 0.6 TURBO 98-2002 SMART CITY-COUPE 0.7 TURBO 2002- 2004 SMART CITY-COUPE 0.8 TD 99-2004 SMART CROSSBLADE 0.6 TURBO 2002-2003 SMART FORTWO (W450) 0.7 TURBO 2004-2007 SMART FORTWO (W450) 0.8 TD 2004-2007 SMART ROADSTER 0.7 TURBO 2003-2005