Moroso 63420 Manifold Filler Neck

Water Neck, Aluminum, Natural, 90 Degree, Chevy, Small Block/Big Block.
Water Neck, Aluminum, Natural, 90 Degree, Chevy, Small Block/Big Block. Sealing Style: Gasket Notes: Unit can be flipped 180 degrees for either right or left outlet locations. Bleed off your radiator's air. Moroso's manifold filler necks are made from 356-T6 cast aluminum; they locate the filler at the highest point to bleed off air on cars with low-mount radiators. These units can be located on either the left or right side of the vehicle. They include 1/2 in. NPT fittings for installation of a water temperature sending unit, and two 1/4 in. NPT fittings for return lines on popular aftermarket cylinder heads. The kits include gaskets, bolts, washers, and a standard size radiator cap filler neck.