Moroso Chevrolet Big Block/Small Block Water Outlet Filler Neck -20An w/O-Ring - Aluminum

This is the Moroso water outlet filler neck, designed for Chevrolet Big Block and Small Block engines. You get the aluminum filler neck itself, which features a -20AN fitting for your coolant lines and includes an O-ring for a solid seal. It's a well-built piece that helps ensure your cooling system stays properly sealed and functions as it should.

Crafted from aluminum, this filler neck is lightweight and resistant to corrosion, which is important for components in the cooling system. The -20AN fitting is a common size for custom cooling setups, making it easier to connect your hoses securely. The included O-ring is key for preventing leaks at the connection point, helping to maintain consistent system pressure and prevent coolant loss.