CNC billet aluminum water neck. Lower hose location for better radiator hose to intake clearance. Designed for K20a1,k20a2, & k20a3 heads.
Includes: Water neck, nipple, 2 socket cap crews, 1 nipple o-ring.
Designed for K20a1, K20a2, and K20a3 heads.
Water neck requires the use of the stock water neck rubber gasket.