Moroso Chevrolet Big Block/Small Block Water Outlet Filler Neck -16An w/O-Ring & Two 3/8in NPT Ports

This Moroso water outlet filler neck is machined from solid aluminum, offering a durable and lightweight solution for your Chevrolet big block or small block engine. It features a -16AN inlet for your coolant lines, complete with an O-ring seal to prevent leaks. The neck also includes two 3/8 inch NPT ports, giving you options for adding sensors or other fittings to your cooling system.

Designed for custom cooling setups, this filler neck is a popular choice when building or modifying engines where the factory setup needs to be replaced or rerouted. The aluminum construction is well-suited for the demands of a cooling system, and the included O-ring ensures a tight seal against the block or manifold, simplifying installation compared to using separate gaskets and sealants.