The Genuine Porsche Secondary Air Injection Pump Check Valve is a high-quality component designed for use in Porsche vehicles. It is specifically designed for the 993 model and has the part number 99311325003. This check valve is an important part of the secondary air injection system, which helps reduce emissions and improve engine performance. It is made from durable materials and is an authentic Porsche product, ensuring reliable and long-lasting performance. This check valve is an essential component for maintaining the proper functioning of the secondary air injection system in Porsche vehicles.