Genuine OEM Citroen Valve Half Cone, part number 9816171280. This small but critical engine component is designed to secure the valve spring retainer to the valve stem, ensuring proper valve operation. It is an essential part of the valvetrain assembly. Weighing just 0.001 kg, this precision-engineered metal piece requires exact dimensions. Choosing genuine OEM ensures the correct material hardness, precise dimensions, and factory-specified tolerances for reliable engine performance and longevity.