Kibblewhite 20-20HS Valve Guide C630 Bronze +0.025 Oversize Harley Panhead Shovelhead 1948-1977

The Kibblewhite 20-20HS is a premium oversize valve guide designed for Harley-Davidson Panhead and Shovelhead 74" engines from 1948 to 1977. Machined to +0.025" oversize dimensions, this guide allows for precise fitting when cylinder head valve guide bores are worn beyond standard specifications.

Material and Construction:

• Manufactured from C63000 nickel-aluminum bronze alloy for optimal performance
• 5% nickel content provides superior wear resistance for extended service life
• Approximately 80% copper content delivers outstanding heat conductivity to prevent valve stem galling
• KPMI® proprietary guide profile maintains critical wall thickness in high-temperature zones

Features and Benefits:

• Suitable for both intake and exhaust applications
• Minimal airflow restriction design promotes maximum engine performance
• Engineered for high-performance and endurance applications
• Precision-machined to strict tolerances for proper valve stem clearance
• +0.025" oversize allows machining of worn guide bores for like-new fit

Kibblewhite precision valve guides are the professional choice for engine builders seeking reliable valve train performance in vintage Harley-Davidson big twin engines. The bronze construction provides the ideal combination of lubricity, heat dissipation, and durability for demanding applications.