Manifold filler neck kit fits Chevy V-8 and 90 degree V-6 applications. It locates the filler neck at the highest point on cars with low-mount radiators to bleed off air. Unit can be flipped 180 for either right or left outlet locations. Includes 1/2″ NPT fitting for installing water temperature sending unit and two 1/4″ NPT fittings for return lines on popular aftermarket cylinder heads. Made of 356-T6 cast aluminum; 3-1/4″ high, and includes gaskets, bolts and washers, and standard size radiator cap filler neck.