Pro Design Cool Head Dome

• Product Details

  Interchangeable O-Ringed domes allow you to adjust compression for fuel quality, elevation, timing or performance.

  • CNC-machined from billet aluminum.
  • Substantial increases in cooling efficiency.

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• Fitment

• # Part Numbers for the Pro Design Cool Head Dome

  Product Variant	Manufacturer Part #
  16cc With Bore 66-68.5mm	PD302BB
  17cc	PD257HD
  18cc With Bore 64-66mm	PD304
  18cc With Bore 66-68.5mm	PD304BB
  19cc With Bore 64-66mm	PD305
  19cc With Bore 66-68.5mm	PD305BB
  20cc With Bore 64-66mm	PD306
  20cc With Bore 66-68.5mm	PD306BB
  21cc With Bore 64-66mm	PD307
  22cc With Bore 64-66mm	PD308

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