71006-8 KPMI, custom valve guide seals. PTFE

For custom engine builds requiring a 5/16-inch valve stem and a .500-inch guide diameter, these Kibblewhite PTFE valve seals offer professional-grade performance. These solid PTFE seals include a metal band and a choker spring to ensure they stay in place under demanding conditions. They are a universal fit but are commonly used on 1984 to 2004 Big Twins and 1986 to 2003 Sportsters. Installation requires a bit of finesse—rolling the seal over the valve tip and using a protector is highly recommended to avoid tearing the material. Sold as a pack of 8, these seals are an excellent choice for mechanics looking for a high-performance alternative to standard Viton seals.