Ring - Sealing | Volvo 418412 Volvo Ring - Sealing | 418412 This Volvo Penta engineered sealing ring was designed to keep your valve cover seal performing as efficiently as possible. Its two interchangeable seals are compatible with "18-2937-9" or "418412" so you can easily switch them out when necessary. This ring helps ensure smoother operation and extended longevity of vital components like valves and lifters. Make sure your Volvo Penta engine is running at its best with this durable and precise sealing ring.