Moroso Chevrolet Big Block/Small Block Water Outlet Filler Neck -20An w/O-Ring & Two 3/8in NPT Ports

This is the Moroso water outlet filler neck for Chevrolet Big Block and Small Block engines. It's designed to provide a secure and convenient point for filling your cooling system, especially in custom setups where the original location might not be accessible or suitable. The neck features a -20AN inlet for connecting your coolant lines, an O-ring for a solid seal, and two 3/8-inch NPT ports for additional sensor or accessory connections.

Built by Moroso, a name known for performance parts, this filler neck is made from durable materials to withstand the heat and pressure of your engine's cooling system. The inclusion of the O-ring helps ensure a leak-free installation, which is crucial for maintaining proper coolant levels and preventing air pockets. The extra NPT ports offer flexibility for racers or builders who need to add temperature sensors, senders, or other fittings directly into the cooling system.