The 'RING BEV. V BELT PULLEY' for the Citroen 11CV Perfo is a crucial component designed to maintain the proper tension and function of the V-belt. Specifically crafted to fit the specifications of the Citroen 11CV, a classic model from the thirties and forties, this ring ensures a secure transmission of power between the engine and the pulley, supporting the operation of the generator, and other accessories. Replacing worn rings is vital to ensure smooth and efficient functioning of the vehicle's systems.