Kibble White Black Diamond Exhaust valveRef : KIBW00122A / 09260331

Valve Black Diamond™ Kibblewhite — an exhaust valve designed for vintage and touring engines that seek reliability and longevity. Made from a single piece of stainless steel with a Stellite tip and special nitriding treatment (depth 0.002" and surface layer 0.0002"), it limits wear and reduces friction while offering better resistance to corrosion and abrasion than hard chrome or electroplating. Lightweight profile designed for excellent gas flow, compatible with leaded and unleaded fuels.

• Application: exhaust
• Tulip angle: 17°
• Head diameter: 1.565" (≈ 39.75 mm)
• Stem diameter: 0.3095" (≈ 7.86 mm)
• Guide compatibility: cast iron or bronze guides with low tolerances
• Material advantages: Stellite tip, deep nitriding for better thermal dissipation and oil control
• Manufacturing: United States

Manufacturer reference: 20-20057 — Brand: KIBBLEWHITE. Ideal for restorations and modifications on Harley-Davidson Softail models (e.g. FXSTSI, FXSTI, FXSTDI 1450 cc - 2004) and other classic engines where the durability of an exhaust valve is critical. Check dimensions and compatibility with your cylinder head before installation.