71011-8 KPMI, custom valve guide seals. Viton

These custom valve guide seals from Kibblewhite Precision Machining are a universal solution for a variety of custom engine applications. Manufactured from solid Viton rubber, they feature a metal jacket and a choker spring to ensure a tight, reliable seal on the valve stem. This set is designed for a 3/8-inch stem diameter and a 0.562-inch valve guide diameter. They are sold as a set of eight, providing enough seals for a complete top-end service. Whether you are working on an older Ironhead or a custom Big Twin build, these Viton seals offer the heat resistance and durability required for modern performance standards.