Genuine OEM Audi Valve Spring Retainer, part number 077109641G. This small, precision-engineered metal disc is a critical component in the engine's valve train, designed to securely hold the valve spring in place. It ensures proper valve operation by maintaining correct spring tension and preventing spring displacement. Weighing just 0.007 kg, this genuine OEM retainer provides the exact dimensions and material strength necessary for reliable, high-RPM engine performance and longevity.