EBC Ultimax rear rotors for 2011–2013 Audi A8 Quattro 4.2 are OE-style vented discs sized at 356mm diameter, 36mm height and 22mm thickness with 5-bolt pattern. Ultimax slotted design uses progressively angled slots to pull cool air through the pad contact area, reducing noise commonly associated with slotted rotors while helping keep brakes cooler and pads cleaner for consistent stopping.
EBC 11-13 Audi A8 Quattro 4.2 Premium Rear Rotors