The 'CARTERONTL. ONDER (CARB) Citroen DS' is an essential part for improving airflow and protecting the engine of the Citroen DS. This crankcase breather is designed to regulate crankcase pressure, ensuring the engine operates efficiently. Manufactured with high-quality materials, this breather offers durability and long service life. It fits perfectly within the engine compartment of the Citroen DS without modifications. Ideal for those looking to optimize the performance and longevity of their classic Citroen. Maintenance-free and easy to install, it is a must-have accessory for any DS owner.