KPMI Black Diamond Valve 20-20905 for Harley-Davidson Evo 1984-1999
50.55mm/ 1.990"
$72.00
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KPMI Black Diamond Valve 20-20905 for Harley-Davidson Evo 1984-1999
$72.00
Upgrade your engine's valvetrain with the KPMI Black Diamond intake valve, engineered specifically for high-demand Harley-Davidson Evolution and Twin Cam 88 engines. Each valve is manufactured as a lightweight, one-piece stainless steel forging designed using Finite Element Analysis software to ensure maximum strength and optimized flow characteristics.
Featuring a specialized German surface treatment, these valves receive a treatment depth of 0.05 mm (0.002 in) with a precise surface buildup that drastically reduces friction and wear. This process delivers superior corrosion resistance compared to standard chrome or nickel electrolysis plating, ensuring reliable valvetrain performance.
Key Features
| Brand | KPMI |
| Product Type | Intake Valve |
| Material | Black Diamond Stainless Steel |
| Coating | Black Nitroneg |
| Quantity | Pkg. of 1 |
| Stem Diameter | 7.9 mm |
| Overall Length | 112.8 mm |
| Tulip Angle | 25º |
| Item Weight | 104 g |
Highlights
- One-piece forged stainless steel construction
- Specialized Black Diamond surface impregnation for reduced friction and extended wear life
- Optimized valve profiles tested on computerized flow benches
- Superior corrosion resistance compared to traditional chrome or nickel plating
Compatibility
- Harley-Davidson Evolution (1984–1999)
- Harley-Davidson Twin Cam 88 (1999–2004)
Frequently asked questions
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