The Genuine Porsche Differential Seal - 99911345641 is a high-quality seal designed specifically for Porsche vehicles. It is used to seal the differential, which is a critical component of the car's drivetrain system that transfers power from the engine to the wheels. This seal is made from durable materials and is designed to withstand high temperatures and pressures, ensuring long-lasting performance. It is an essential part for maintaining the proper functioning of the differential and ensuring a smooth and efficient driving experience.