Kibblewhite 20-50HS Valve Guide Cast Iron Oversize Harley Shovelhead - C630 0.025

The Kibblewhite 20-50HS is a premium oversize valve guide engineered for Harley-Davidson Shovelhead 80" engines from 1978-1983. Manufactured from proprietary C630 cast iron, this guide features a +0.025" oversize diameter for intake and exhaust applications, making it ideal for rebuilding worn cylinder heads.

Key Features:

• Proprietary C630 cast iron material with custom-formulated alloy composition
• +0.025" oversize diameter for both intake and exhaust valves
• Highly pearlitic structure with dense fine grain for superior durability
• Precision-engineered elements including carbon, silicon, manganese, nickel, chromium, copper and sulfur
• Excellent wear resistance for extended valve train life
• Direct fit for Harley-Davidson Shovelhead 80" engines (1978-1983)

Kibblewhite's exclusive C630 cast iron specification delivers exceptional performance through advanced metallurgy. The material's fine-grain pearlitic structure provides outstanding wear characteristics, ensuring consistent valve movement and longevity in demanding high-performance and rebuilt engine applications.