O-Ring Boss Port Y-Manifold

The MEZIERE O-Ring Boss Port Y-Manifold is a precision fluid distribution component designed for high-performance cooling and heating system applications in modified vehicles. This manifold serves as a critical junction point for custom cooling loops, engine bay fluid routing, and auxiliary system plumbing—making it essential for builders tackling serious engine modifications, custom water-cooling setups, or complex auxiliary component integration.

Built with an O-ring boss port design, this Y-manifold ensures leak-free connections using standard AN-compatible fittings and sealing surfaces—a critical feature when working with pressurized cooling systems or fuel-based auxiliary circuits. The compact 3.75 x 2.4 x 5.6-inch footprint and lightweight construction make it ideal for tight engine bay layouts common in performance builds where space is at a premium. MEZIERE's engineering focuses on aluminum construction and precision porting, allowing smooth fluid flow transitions that minimize pressure drop and turbulence.

Mechanics and enthusiasts building custom cooling systems, supercharged or turbocharged engines, or multi-component thermal management systems will find this Y-manifold invaluable. Its three-port configuration consolidates multiple fluid lines into a single, organized feed, making it easier to integrate remote coolers, secondary heaters, or multi-zone thermal management systems.