Genuine OEM Audi Seal, part number 04L129717H. This seal is designed to provide a secure, airtight connection within the intake and turbocharger assembly. It is manufactured from high-grade, heat-resistant material to withstand the high pressures and temperatures characteristic of forced induction systems. Using genuine OEM seals is critical to maintain boost pressure integrity and prevent air leaks, as they are engineered to the exact tolerances required for a perfect, reliable seal in the intake circuit.