Black Diamond Replacement Valves for Evo Sportster Conversion

Goodson Tools & Supplies

Order No. 20-2010

Type Head
Stem Diameter Tulip Radius Tulip Angle Overall Length Order No.
Intake 1.715" 0.3100" 0.236 23º 4.550" 20-2010
Exhaust 1.480" 0.3096" 0.500 40º 4.625" 20-2012
  • 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