The cylinder head bolt for a Citroën 15CV is a vital fastener designed to securely attach the cylinder head to the engine block. This bolt is crucial for ensuring a proper seal of the cylinder head, allowing the engine to operate efficiently. It's made from high-quality steel for durability and resistance to heat and pressure. Frequently used in classic Citroën models, this specific bolt helps maintain the historical value of your vehicle. Ensure the bolt is tightened to the correct torque to prevent leaks and potential damage.