The Carterstop Ring for Citroën 11CV Perfo/15CV is a crucial sealing ring used to prevent oil leaks from the oil sump. This component is specifically designed to perfectly fit classic Citroën models like the 11CV and 15CV with a Perfo engine. Made from durable materials, the ring provides reliable sealing and helps maintain engine performance and efficiency. This ring is essential for owners looking to keep their classic Citroën in top condition and can be easily installed during maintenance or repair works.