The Genuine Porsche Alternator Pulley (part number 99660315156) is a high-quality replacement part for Porsche vehicles. It is designed to be used in the alternator system of the car, specifically for the Porsche 996 model. The pulley is responsible for transferring power from the engine to the alternator, which is crucial for maintaining the battery charge and powering the electrical components of the vehicle. This pulley is an authentic Porsche product, ensuring a perfect fit and reliable performance. It is made with durable materials to withstand the rigors of daily driving and is an essential component for the proper functioning of the alternator system in a Porsche 996.