Pro Design PD307 Cool Head Dome - Standard Bore (21cc) suspension-tie-rods-tie-rod-ends Shear stable

Shear stable

12V mounts to Generator

100% waterproof UltraMax polyester with heat taped seams

2014 KTM 250 XC-W

1972-1973 Honda XL250

Pro Design PD307 Cool Head Dome - Standard Bore (21cc) suspension-tie-rods-tie-rod-ends Shear stableBillet 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. Race Gas Only.