20an Water Neck Adapter Fitting Female 90-Degree

The 20AN water neck adapter fitting female 90-degree is a precision coolant system component engineered for custom cooling line routing in high-performance and modified engines. Whether you're building a street rod, upgrading a race engine, or customizing a late-model platform, this adapter lets you redirect coolant flow at a 90-degree angle to optimize hose paths around engine bay obstacles. MEZIERE manufactures this fitting to OEM-grade standards, making it an essential solution for builders who demand reliability in their cooling architecture.

The 20AN female 90-degree water neck adapter uses AN (Army-Navy) standardized port sizing, ensuring compatibility with industry-standard braided stainless steel hoses and fittings. The 90-degree elbow geometry reduces sharp bends in cooling hoses, lowering turbulence and pressure drop while protecting hose integrity under thermal cycling and vibration. Precision-machined from aluminum alloy, the fitting features a female connection port rated for coolant systems operating at typical automotive pressures, with a compact footprint (4.65 x 2.15 x 5.4 inches) that fits tight engine compartments without compromise.

Mechanics and engine builders favor this adapter when designing custom water pump inlet/outlet configurations, block-mounted thermostat housings, or radiator hose runs on modified powerplants. It integrates seamlessly into any cooling system using AN fittings and works equally well on carbureted classics, EFI conversions, and modern turbocharged platforms. Installation requires only a matching AN fitting or hose end connection; the lightweight design (0.37 lbs) adds negligible mass while maintaining structural integrity through repeated thermal stress cycles.