Black Diamond™ Engine Valve

Kibblewhite Black Diamond™ Engine Valve is designed for riders and engine builders who want dependable sealing, efficient flow and long service life from their valvetrain. This intake valve is CNC machined from a one-piece EV8 stainless-steel forging for a lightweight yet strong construction, and its profile is engineered to deliver excellent flow characteristics.

To help your engine stay consistent under heat and high load, the valve receives a specialized German infusion process that improves wear properties, reduces friction and provides corrosion resistance beyond typical chrome or nickel electrolysis plating. The stem is finished with a black nitroneg coating for added durability where it matters most.

Key features:

• ✅ One-piece EV8 stainless forging: CNC machined for strength and precision
• ✅ Optimized flow profile: designed with F.E.A. and validated on a computerized flow bench
• ✅ Wear & friction reduction: infusion treatment + black nitroneg-coated stem

Benefits of use:

• 🔹 Longer service life: improved wear and corrosion resistance for demanding engines
• 🔹 Consistent performance: stable valve operation with reduced friction at the stem/guide interface
• 🔹 Pro-level engineering: proven design process for reliable valvetrain results

Technical specifications:

• 📌 Application: Intake
• 📌 Head diameter: 37.00 mm (1.457")
• 📌 Stem diameter: 5.00 mm (0.2158")
• 📌 Length: 83.31 mm (3.280")
• 📌 Tulip angle: 20°
• 📌 Material: Stainless steel (EV8)
• 📌 Units: Each

Why choose this product?

• ⭐ Made in the USA with high-quality materials and precision machining
• ⭐ Advanced surface technologies aimed at reducing wear, friction and corrosion
• ⭐ Important note: requires the use of a Kibblewhite spring kit