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: 6 Diameter (mm): 348 Height (mm): 80 Thickness (mm): 25 Minimum thickness (mm): 23 Axle application: Rear APPLICATION Brand Model Engine Value Power (HP) Year of manufacture FORD F-150 2012-2014 FORD F-150 2012-2014 FORD F-150 2015-2017 FORD F-150 2015-2017 FORD F-150 2018- FORD F-150 2018-