Black Diamond Replacement Valves for Evolution (84-99)

Goodson Tools & Supplies

  • 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

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Order No. Description Price Quantity
20-4171 Intake | 1.840" Head Dia. | 0.3100" Stem Dia. | 0.236 Tulip Rad. | 23º Tulip Angle | 4.445" OAL $17.31
20-20905 Intake | 1.990" Head Dia. | 0.3108" Stem Dia. | 0.675 Tulip Rad. | 25º Tulip Angle | 4.440" OAL | Supersedes HBV-1990 $23.88
20-20905 Intake | 1.940" Head Dia. | 0.3108" Stem Dia. | 0.675 Tulip Rad. | 25º Tulip Angle | 4.440" OAL | Supersedes HBV-1940 $23.88
20-20915 Intake | 1.900" Head Dia. | 0.3108" Stem Dia. | 0.675 Tulip Rad. | 25º Tulip Angle | 4.440" OAL | Supersedes HBV-1900 $23.88
20-4171R Intake (Racing) | 1.900" Head Dia. | 0.3100" Stem Dia. | 0.344 Tulip Rad. | 28º Tulip Angle | 4.420" OAL | Supersedes HBV-1900S $17.31
20-20900 Intake) | 2.150" Head Dia. | 0.3108" Stem Dia. | 0.550 Tulip Rad. | 24º Tulip Angle | 4.480" OAL | Supersedes HCV-2150 $23.88
20-4170 Exhaust | 1.615" Head Dia. | 0.3096" Stem Dia. | 0.236 Tulip Radius | 29º Tulip Angle | 4.525" OAL | Supersedes HEV-10 $17.31
20-4170R Exhaust (Racing) | 1.630" Head Dia. | 0.3096" Stem Dia. | 0.500 Tulip Radius | 40º Tulip Angle | 4.525" OAL $17.31
20-20920 Exhaust | 1.650" Head Dia. | 0.3106" Stem Dia. | 0.750 Tulip Radius | 25º Tulip Angle | 4.515" OAL | Supersedes HBV-1650 $23.88
20-20925 Exhaust | 1.610" Head Dia. | 0.3106" Stem Dia. | 0.750 Tulip Radius | 25º Tulip Angle | 4.510" OAL | Supersedes HBV-1610D $23.88
20-20930 Exhaust | 1.585" Head Dia. | 0.3106" Stem Dia. | 0.750 Tulip Radius | 25º Tulip Angle | 4.505" OAL | Supersedes HBV-1585 $23.88
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