EBC GD Sport rear rotors for 2011–2013 Audi A8 Quattro 4.2 are vented, slotted discs sized to OE specifications (356mm diameter, 36mm height, 22mm thickness, 5-bolt). Made from OE-spec grey cast iron—with much of EBC's range produced in their British foundry—these rotors use slots to clear dust and debris and help brakes run cooler under load for sustained stopping performance.
EBC 11-13 Audi A8 Quattro 4.2 GD Sport Rear Rotors