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): 278 Height (mm): 49 Thickness (mm): 25 Minimum thickness (mm): 23 Axle application: Front APPLICATION Brand Model Engine Value Power (HP) Yearbook MAZDA 3 1.4 2004-2005 MAZDA 3 1.4 2005-2009 MAZDA 3 1.6 2004-2005 MAZDA 3 1.6 2005-2009 MAZDA 3 1.6 2009-2013 MAZDA 3 1.6 TD 2004-2005 MAZDA 3 1.6 TD 2005-2009 MAZDA 3 1.6 TD 2009-2013 MAZDA 5 1.6 TD 116 2010-2017 MAZDA 5 1.8 116 2005-2010 MAZDA 5 1.8 116 2010-2017 MAZDA 5 2.0 TD 110 2005-2011