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: 4 Diameter (mm): 294 Height (mm): 44 Thickness (mm): 22 Minimum thickness (mm): 20 Axle application: Front APPLICATION Brand Model Engine Value Power (HP) Year MINI MINI CLUBMAN (R55) 1.6 TURBO COOPER S 2007-2015 MINI MINI CONVERTIBLE (R52) 1.6 SUPERCHARGED WORKS 2005-2007 MINI MINI CONVERTIBLE (R57) 1.6 TURBO COOPER S 2009-2016 MINI MINI COUPE (R58) 1.6 TURBO COOPER S 2011-2015 MINI MINI HATCH (1ST GEN) (R53) 1.6 SUPERCHARGED WORKS 2001-2003 MINI MINI HATCH (1ST GEN) (R53) 1.6 SUPERCHARGED WORKS 2003-2006 MINI MINI HATCH (2ND GEN) (R56) 1.6 SUPERCHARGED WORKS 2006-2008 MINI MINI HATCH (2ND GEN) (R56) 1.6 TURBO COOPER S 2006-2013 MINI MINI ROADSTER (R59) 1.6 TURBO COOPER S 2012-2015