This product is a valve cover stud for the Citroen 11CV with Perfo engine, as well as the HY models up to September 1963. The stud is crucial for securely fastening the valve cover to the engine, ensuring proper sealing and operation. This M7 stud is designed to specifically fit the indicated vehicles, providing assurance for proper installation and stability. The part is manufactured from high-quality material for long-lasting durability. This ensures the engine operates smoothly and is protected from dirt and oil leaks.