71003-8 KPMI, custom valve guide seals. PTFE

These custom valve stem seals from Kibblewhite are made from solid PTFE and feature a metal band and choker spring for a secure fit. Designed for universal applications, they are particularly suited for 1984 to 2004 Big Twins and 1986 to 2003 Sportsters with a 5/16-inch valve stem and a .425-inch guide diameter. Because PTFE is a unique material, these seals require a specific installation technique; they are typically sized smaller than the stem and should be rolled onto the guide with care. Sold as a pack of 8, these seals provide a high-quality, durable solution for custom engine builds where standard rubber seals might not suffice.