Description
The Kibblewhite Black Diamond Intake Valve is designed for Harley-Davidson Evolution engines from 1984 to 1999. Made from one-piece stainless steel with a stellite tip, this valve undergoes a specialized German nitriding process that enhances durability, reduces friction, and increases resistance to corrosion and wear-outperforming chrome and nickel electrolysis plating. Its lightweight construction and optimized profile ensure excellent flow characteristics. Compatible with both leaded and unleaded fuels, it performs well in cast iron and bronze guides, maintaining tight tolerances for optimal oil control and heat dissipation.
20-4171R made by Kibblewhite
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