Kibblewhite 20-20970 Black Diamond Stainless Exhaust Valve 1.610" Harley Evo Twin Cam

The Kibblewhite Precision Machine Black Diamond exhaust valve is engineered for 1984-2004 Harley-Davidson Big Twin engines, including Evolution and Twin Cam models. Featuring a 1.610" head diameter, this premium stainless steel valve delivers superior performance and longevity for high-performance and stock applications.

Black Diamond Surface Treatment:

Each valve undergoes a proprietary German impregnation process that penetrates .002" deep with a .0002" surface buildup. This Black Diamond coating provides exceptional wear resistance that surpasses traditional chrome and nickel plating, while reducing friction and offering superior corrosion protection for extended valve life.

Key Features:

• One-piece forged stainless steel construction for maximum strength
• Lightweight design reduces valvetrain weight and inertia
• Valve profile designed using Finite Element Analysis software
• Flow-optimized geometry tested on computerized flow bench
• Excellent flow characteristics for improved engine breathing
• Black Diamond coating reduces friction and wear
• Superior corrosion resistance for long-term durability

Kibblewhite Precision Machine valves are trusted by professional engine builders and performance enthusiasts for their quality, precision manufacturing, and proven reliability in demanding applications.