Genuine OEM Audi secondary air injection pipe, part number 079131166AQ. This pipe is a critical component of the secondary air injection system, responsible for routing air to the exhaust ports to assist in reducing emissions during cold starts. It is positioned within the emissions control assembly as indicated in the diagram. Manufactured to precise dimensions, this pipe ensures correct routing geometry and a leak-free connection to the associated valves. Genuine OEM construction is essential for this part to ensure heat resistance and the exact fitment required to maintain the integrity of the emissions system.