The Ferrari stop-ring (SKU fe-166901) is a compact, durable component designed to secure parts in place and maintain proper spacing within assemblies. This ring supports reliable operation by limiting unwanted axial movement and preserving alignment under typical driving conditions. Engineered with Ferrari standards in mind, it offers dependable performance as part of a larger system, helping protect adjacent components from wear and ensuring smooth operation over time. This part is designed for repeated service life and steady performance in diverse conditions. What is the stop-ring? A stop-ring is a circular, ring-shaped fastener used to locate, retain, or limit movement of parts along a shaft or inside a bore. It sits in a groove or on a seating surface to establish a known position and prevent components from migrating or rubbing together. In automotive applications, stop-rings help keep bearings, gears, pulleys, and other rotating parts aligned. Why is the stop-ring Important? Replacing a worn or damaged stop-ring is essential for maintaining proper engagement of adjacent parts and preventing unwanted play. A healthy stop-ring supports consistent clearance, reduces vibration, and minimizes abrasive wear on mating surfaces. It also helps avoid misalignment that could affect performance, efficiency, and safety. For Ferrari systems, where precision matters, a fresh stop-ring helps sustain the intended geometry and ensures the chosen setup continues to respond predictably under load. Installation Guide & Support To install, ensure the area is clean and free of debris, inspect the groove or seating surface for damage, and align the stop-ring with the correct orientation before seating it firmly in place. Use appropriate tooling to avoid distortion, apply even pressure, and verify that there is no binding and that the assembled parts rotate smoothly. If you need assistance, rely on general installation guidance and support resources available for Ferrari components to ensure proper fit and reliable performance. At SparesUSA.net, we specialize in providing high-quality automotive spare parts for some of the world’s most iconic luxury and performance brands, Ferrari, Maserati, Lamborghini, and Bentley. With years of expertise and a passion for precision, we offer a wide range of OEM parts, ensuring your prized vehicle runs at its best. We understand that maintaining these prestigious cars requires the right parts, and our inventory is carefully curated to meet the highest standards of quality and performance. From hard-to-find engine components to essential body parts, suspension parts, or electrical systems, SparesUSA.net is your trusted source for all your automotive needs. Our commitment to customer satisfaction extends beyond just supplying parts — we offer fast, reliable shipping worldwide to ensure that no matter where you are, you have access to the best in automotive parts. With a focus on excellence, authenticity, and exceptional customer service, SparesUSA.net is proud to serve car enthusiasts, collectors, and professionals around the globe. Let us help you keep your luxury vehicle performing at the highest level. Register your account on the site and let's find the right setup for your company. You may be interested in: Genuine parts for Ferrari Genuine parts for Bentley Genuine parts for Maserati Genuine parts for Lamborghini Contact Make sure that you buy the right part for your vehicle. If you have any questions about the stop-ring, then you can always send an e-mail or call us.