Allstar 1QT aluminum tanks are for cars with the manifold filler neck higher than the radiator top tank. Tanks can be easily mounted as the highest point of the cooling system. Features include a heavy duty aluminum neck with an 1/8″NPT port for an overflow fitting, a 1/2″NPT bung on bottom for a supply, and a 3/8″NPT for a return line. 8″ tall, 3.5″ diameter, 4-3/8″ Bolt Spacing on Bracket.