#4 90 Male > Female Swiv

The #4 90 Male > Female Swiv adapter by EARLS is a precision-engineered 90-degree AN fitting designed for high-performance fuel, oil, and coolant line routing in custom automotive builds. This adapter transitions a 4 AN male connection to a 4 AN female swivel outlet, allowing you to redirect hose runs at a right angle without kinks or stress on adjacent components. Built for serious enthusiasts tackling engine bay modifications, fuel system upgrades, or custom cooling setups, this fitting eliminates the need for costly custom hose fabrication when standard straight runs won't fit your layout.

Machined from lightweight aluminum and finished in blue anodized coating, the #4 90 Male > Female Swiv delivers corrosion resistance and clean aesthetics under the hood while keeping weight minimal—critical in performance applications. The swivel female end allows hose connection without torque transmission to the fitting itself, reducing vibration-induced leaks and extending hose life in high-vibration engine environments. At just 0.03 lbs and compact dimensions (1.65 x 1 x 2.9 inches), this adapter fits tight spaces typical of turbocharged or supercharged builds where real estate is scarce. EARLS fittings are proven in circle-track racing, drag racing, and street performance applications where reliability under pressure is non-negotiable.

This fitting is essential for anyone fabricating custom fuel, oil, or cooling lines in modified engines where factory hose routing is impossible or incompatible with aftermarket components. The 4 AN size handles flows up to approximately 100+ gallons per hour, making it ideal for boosted engines with upgraded fuel systems, LS conversions, or bespoke cooling circuits. Installation requires standard AN wrenches and compatible 4 AN hose with swaged or crimped fittings; verify your hose supplier's swivel compatibility before assembly. Pair with EARLS hose, clamps, and adapters to build a complete, leak-free fuel or cooling system that matches your build's performance demands.