4 to 1 Coolant Manifold -16an Outlet

The 4 to 1 Coolant Manifold -16an Outlet from CSR Performance is a precision aluminum coolant distribution hub engineered for custom cooling system builds and high-performance engine modifications. This component consolidates multiple coolant sources into a single -16 AN outlet, making it essential for builders integrating aftermarket water pumps, auxiliary cooling circuits, or remote radiator setups. Whether you're upgrading a street car, race engine, or custom build, this manifold simplifies plumbing complexity while maintaining system integrity under demanding conditions.

Constructed from clear anodized aluminum, the 4 to 1 coolant manifold features four 12 AN female O-ring inlets that accept standard AN fittings without leak-prone thread sealants. The single 16 AN male outlet concentrates all coolant flow into one high-capacity line, reducing fitting count and potential failure points in your cooling system. An integrated radiator cap bung provides convenient overflow or remote pressure cap mounting, while the anodized finish resists corrosion from glycol-based coolants and provides excellent thermal stability. Compact dimensions of 5.4 x 5.25 x 5.6 inches and a lightweight 1.18 lbs design make installation accessible in tight engine bays typical of modified vehicles.

Professional engine builders and serious enthusiasts rely on this manifold when designing progressive cooling solutions for turbocharged, supercharged, or naturally aspirated builds requiring multiple coolant feed points. It pairs seamlessly with aftermarket thermostat housings, secondary water pumps, and intercooler systems where consolidating inlet lines simplifies routing and improves serviceability. The robust aluminum construction and O-ring inlet design ensure reliable performance across street, strip, and road course applications without concern for weeping connections or pressure loss. Verify AN hose and fitting compatibility with your specific cooling layout before installation to ensure optimal flow distribution throughout your custom system.