The rear axle silentblock retaining ring is a crucial component for the suspension system of the Citroen 11CV and 15CV. This rubber element, placed between the metal parts of the rear axle, absorbs shocks and reduces vibrations while driving, contributing to a comfortable driving experience. It also prevents metal-to-metal contact, reducing wear on the suspension elements and prolonging the car's lifespan. Specifically designed for vintage Citroen models, this retaining ring fits perfectly in classic cars. Maintaining this part is essential for the vehicle's safety and performance.