Genuine OEM Jaguar Engine Valve Lifter, part number C2C40029. This hydraulic tappet is a critical component within the cylinder head, responsible for transferring motion from the camshaft to the engine valves. It ensures precise valve timing and quiet operation by maintaining zero valve lash. Positioned above the valve springs, it is integral to the engine's valvetrain. Genuine OEM valve lifters are manufactured to exact tolerances, ensuring optimal engine performance and longevity by preventing excessive wear and noise.