The Genuine BMW M-Performance Limited Slip is a high-performance differential that is designed to improve the handling and traction of BMW vehicles. It is specifically designed for use in high-performance driving situations, such as on the track or during spirited driving on winding roads. This limited slip differential helps to distribute power evenly between the two rear wheels, allowing for better grip and control in corners and during acceleration. It is a genuine BMW product, made with high-quality materials and designed to fit seamlessly into BMW vehicles. The part number for this product is 33108659988.