The Pierburg Porsche Secondary Air Injection Control Valve - 700018500 is a component used in the secondary air injection system of Porsche vehicles. This valve is responsible for controlling the flow of air into the engine during cold starts, helping to reduce emissions and improve engine performance. It is a high-quality, OE replacement part that is designed to meet the specifications and standards of Porsche vehicles. This control valve is made by Pierburg, a trusted manufacturer in the automotive industry, and is built to provide reliable and long-lasting performance.