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Pro Design 27-0321 Cool Head Dome Standard Bore 21Cc

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$84.76

$ 40 .99 $40.99

In Stock
  • Billet-machined design offers noticable bolt-on performance gains
  • Increased torque and power as a result of increasing compression
  • Larger water jacket area supplies more water; you get the ultimate in cooling efficiency by eliminating overheating
  • Cool Head shells and Cool Domes sold separately to give you a choice of compression ratios
  • Features include O-ring seal (no gaskets required) and adjustable and removable compression domes


Billet-machined design offers noticable bolt-on performance gains. Increased torque and power as a result of increasing compression. Larger water jacket area supplies more water; you get the ultimate in cooling efficiency by eliminating overheating. Cool Head shells and Cool Domes sold separately to give you a choice of compression ratios. Features include O-ring seal (no gaskets required) and adjustable and removable compression domes. Gas Only.
1987-2006 fits YAM YFZ350 Banshee