Genuine OEM Hyundai Valve Spring, part number 2222103001. This vital engine component is located within the cylinder head, where it acts upon the engine valves. Its primary function is to close the engine valves after they have been opened by the camshaft, ensuring precise timing for the intake and exhaust cycles. Manufactured from high-strength spring steel, it is designed to withstand extreme temperatures and high-frequency compression cycles. Using a genuine OEM valve spring guarantees the correct spring rate and material integrity, which is crucial for maintaining optimal engine performance, preventing valve float, and ensuring long-term engine reliability.