Kibblewhite 40-40921 Black Diamond Stainless Steel Engine Valve

The Kibblewhite 40-40921 is a premium Black Diamond stainless steel engine valve engineered for superior performance and durability in high-performance powersports applications. Each valve undergoes a specialized German surface treatment process that impregnates the valve to a depth of .002" with a surface build-up of .0002", creating an extremely hard, wear-resistant surface.

Key Features:

• Black Diamond surface treatment provides exceptional wear resistance superior to traditional chrome or nickel plating
• Reduces friction and improves heat dissipation for consistent performance
• One-piece forged construction ensures maximum strength while maintaining lightweight design
• Precision-engineered profile developed using Finite Element Analysis (FEA) software
• Flow-optimized design tested on computerized flow bench for maximum airflow efficiency
• Superior corrosion resistance extends valve service life
• Premium stainless steel construction withstands high-temperature operation

Kibblewhite Precision Machining Inc. (KPMI) valves are designed for riders and racers who demand the highest quality engine components. The Black Diamond coating technology provides a harder, more durable surface than conventional valve treatments, ensuring reliable performance under extreme conditions.