Pro Design PD300 Cool Head Shell

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