The EBC Ultimax slotted rear rotor set is specified for 2007–2011 Mercedes-Benz G55 AMG (BM463) and is an OE-style vented disc at 330mm diameter and 22mm thickness. The Ultimax slots are angled to pull cool air through the rotor for lower operating temperatures and reduced dust, delivering quieter operation compared with traditional slotted designs as described in the source.
EBC 07-11 Mercedes-Benz G55 AMG (BM463) 5.4L Supercharged RK Premium Rear Rotors