Genuine OEM Jaguar Hydraulic Valve Tappet, part number C2C40031. This component, also known as a hydraulic lifter, is a vital part of the engine's valve train, responsible for transferring motion from the camshaft to the engine valves. It sits within the cylinder head, ensuring precise and quiet valve actuation by maintaining zero valve lash. Its hydraulic design automatically adjusts for wear, reducing noise and improving engine efficiency. Choosing a genuine OEM tappet ensures factory tolerances and material quality for optimal valve timing and long-term engine reliability.