Genuine OEM Audi Engine Intake Valve Spring, part number 06E109623AC. This spring is a vital component within the engine's valvetrain, specifically designed to close the intake valves after they have been opened. It is located within the cylinder head assembly, surrounding the intake valve stem. Weighing approximately 0.034 kg, this precision-engineered spring ensures consistent valve operation. Choosing genuine OEM guarantees the correct spring rate and material fatigue resistance, which are essential for reliable engine performance and efficient air-fuel mixture intake.