All ADA Racing billet heads are made from 6061-T6 aluminum and CNC machined for consistency and performance. Clear anodized for protection against corrosion. This is the headshell only for the Kawasaki Ultra 150/1200cc engine. Includes orings that fit into the grooves in the headshell, aluminum spacer washers, and brass fittings. This head is completely sealed by orings, no head gasket is required.

NOTE: For reference, the stock head is equivalent to 46cc domes. For '99 models with stock carbs, you need to check your serial# for the correct ignitor. If the serial# is KAW44000 or lower then you need the 44cc dome for premium pump gas. If the serial# is KAW44001 or higher then you can use the 42cc domes for premium pump gas.