Black Diamond Replacement Valves for Evo Sportster Conversion
- Black Nitroneg stems
- One piece forged stainless steel valves impregnated with a special German process to improve wear properties and reduce friction
- Provide resistance to corrosion and wear superior to hard chromium and electrolysis nickel plating
- Single Groove valves
- See Specifications Below
- Not sure which you need, view or download the chart from the Goodson catalog.