For Rolls Royce Ghost Series I (2009-2014)

RollsRoyce part number 34216775295 is a ventilated brake disc. The purpose of a ventilated brake disc is to dissipate heat more effectively than a solid brake disc. This is important because brake discs can become very hot during use, and if the heat is not dissipated effectively, it can cause the brake disc to warp or crack.

Ventilated brake discs have a series of holes or vanes drilled through them. These holes or vanes allow air to circulate through the brake disc, which helps to cool it down. Ventilated brake discs are typically used on high-performance vehicles, such as sports cars and luxury cars, because they can handle more heat and provide better braking performance.