The Pierburg Secondary Air Injection Pump Check Valve (part number 722286540) is an essential component in the secondary air injection system of a vehicle. This valve is responsible for regulating the flow of air from the secondary air injection pump to the exhaust system, ensuring that the correct amount of air is delivered for optimal performance. It is designed to prevent backflow and maintain pressure within the system, helping to reduce emissions and improve engine efficiency. The Pierburg Secondary Air Injection Pump Check Valve is a high-quality, reliable product that is compatible with a wide range of vehicles.