The vent valve nut for Citroën 11CV/15CV is a crucial component used to ensure the proper functioning of the valve system in classic Citroën models. This nut plays a key role in securing and optimizing airflow within the engine, enhancing efficiency and performance. When maintaining or restoring these iconic vehicles, choosing a quality nut is essential to ensure durability and reliability. This part is specifically designed for the Citroën 11CV and 15CV, providing a good seal and secure fastening.