Kibblewhite Bronze Exhaust Valve Guide +.001 Fits HD Sportster 1957-1983

The KPMI Exhaust Valve Guide is crafted from C63000 nickel-aluminum bronze, a premium high-performance material chosen for its exceptional wear resistance and heat conductivity. With 5% nickel for durability and approximately 80% copper for efficient heat dissipation, this valve guide ensures reliability in high-temperature conditions. Designed to minimize airflow disruption while maintaining critical cross-sectional thickness, it enhances both performance and longevity.