The Genuine Porsche Secondary Air Injection Pump (part number 99660510404) is a component of the secondary air injection system in Porsche vehicles. This pump is responsible for injecting additional air into the exhaust system to reduce emissions and improve overall engine performance. It is a genuine OEM part made by Porsche and is designed to fit perfectly in 996 model vehicles. This secondary air injection pump is crucial for maintaining the proper functioning of the secondary air injection system and ensuring compliance with emissions regulations.