Valve Black Diamond™ by KIBBLEWHITE (manufacturer part number: 20-4195): a monoblock exhaust valve designed for vintage/classic projects and road/touring applications. Made from stainless steel with a Stellite tip, it combines lightweight construction and optimised flow profiles for reliable operation and delayed wear in demanding configurations.
- Treatment: special nitriding (depth 0.002"; surface layer 0.0002") to reduce friction and improve wear resistance.
- Materials: monoblock stainless steel body, Stellite tip — superior corrosion and wear resistance compared to hard chrome and electrolytic nickel plating.
- Fuel compatibility: suitable for leaded and unleaded fuels.
- Guides: designed for cast iron or bronze guides with low tolerances, for optimal oil control and maximum heat dissipation.
- Application: exhaust.
- Angles and dimensions: tulip angle 29°; head diameter 1.750"; stem diameter 0.3760".
- Origin: made in the USA.
Ideal for restorations and modifications on 1980s Harley twin-cylinder models — such as the FXWG 1340 Wide Glide, FXS 1340 Low Rider, and FXR 1340 Super Glide II — this valve offers durability and longevity without overstating technical promises. Suitable for riders concerned about the reliability and longevity of the valve train.
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