Genuine OEM Volkswagen hexagon head bolt, part number N91190301. This mechanical fastener is engineered to provide a secure connection within the exhaust and turbocharger assembly. It is designed to withstand significant thermal cycling and vibration without losing clamping force. The bolt features a standard hexagonal head for reliable torque application during installation. Using genuine OEM bolts ensures the metallurgy is rated for the specific heat and stress requirements of the engine bay. This bolt is essential for maintaining the structural integrity of exhaust-mounted components.