71017-8 KPMI, custom valve guide seals. Viton

These Kibblewhite valve stem seals are manufactured from high-grade Viton rubber, featuring a metal jacket and a choker spring for a secure fit on the guide. Designed for 6mm valve stems and a 0.385-inch valve guide diameter, these seals are perfect for high-performance custom builds. The Viton material provides superior resistance to heat and chemical breakdown, ensuring your top end stays sealed for the long haul. With an overall length of 0.371 inches and a compact 0.480-inch outside diameter, they fit well in tight spring packages. Kibblewhite components are trusted by engine builders worldwide for their precision and quality. These seals are sold as a set of eight, making them a convenient choice for a full top-end overhaul.