ST 5.0 Series Cylinder Heads
  • 171cc Intake Port Volume
  • Unassembled, Bare Head
  • $1,303.46
    Estimated to ship direct from manufacturer on 03/27/24, pending manufacturer availability.
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    ST 5.0 Series Cylinder Heads
  • 171cc Intake Port Volume
  • 1.470'' Diameter Valve Springs - 325# Open, 125# Closed Spring Pressure
  • $1,635.99
    Estimated to ship direct from manufacturer on 03/27/24, pending manufacturer availability.
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    $1,579.99
    Estimated to ship direct from manufacturer on 03/27/24, pending manufacturer availability.
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    $1,634.90
    Estimated to ship direct from manufacturer on 04/25/24, pending manufacturer availability.
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    $1,557.60
    Estimated to ship direct from manufacturer on 03/27/24, pending manufacturer availability.
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    ST 5.0 R Series Cylinder Heads
  • 171cc Intake Port Volume
  • Unassembled, Bare Head
  • $1,303.46
    Estimated to ship direct from manufacturer on 03/27/24, pending manufacturer availability.
    FREE Shipping
    Lowest Price Guarantee

    ST 5.0 R Series Cylinder Heads
  • 171cc Intake Port Volume
  • 1.470'' Diameter Valve Springs - 325# Open, 125# Closed Spring Pressure



  • $1,558.99
    Estimated to ship direct from manufacturer on 04/19/24, pending manufacturer availability.
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    BP ST 5.0 R Series Cylinder Heads
  • 185cc Intake Port Volume
  • 100% CNC Ported
  • Unassembled, Bare Head
  • $2,841.60
    Estimated to ship direct from manufacturer on 03/27/24, pending manufacturer availability.
    FREE Shipping
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    BP ST 5.0 R Series Cylinder Heads
  • 185cc Intake Port Volume
  • 1.470'' Diameter Valve Springs - 325# Open, 125# Closed Spring Pressure100% CNC Ported