#20 Female x #16 Male Swivel Reducer Black

The #20 Female x #16 Male Swivel Reducer Black by FRAGOLA is a precision aluminum adapter fitting designed for high-performance fuel system, coolant line, and hydraulic brake applications in modified vehicles. This straight swivel reducer bridges two different AN (Army-Navy) port sizes, allowing mechanics and enthusiasts to connect #20 AN female ports to #16 AN male lines without restricting flow or creating dead spots in the system. Built for custom engine builds, fuel injection conversions, and turbo installations where flexible plumbing layouts demand step-down adapters.

Constructed from lightweight aluminum with black anodized finish, the #20 Female x #16 Male Swivel Reducer resists corrosion and maintains structural integrity under pressure cycling and vibration. The swivel design at both ends permits ±360° rotation, eliminating hose kinking and reducing installation stress on adjacent fittings—critical when working in tight engine bays or around headers and turbochargers. FRAGOLA's precision machining ensures consistent bore diameter and zero internal burrs, preserving fuel atomization and cooling efficiency in performance fuel systems operating at 40+ psi or brake systems under high transient pressure.

Custom builders and seasoned mechanics choose this adapter when retrofitting LS, EFI, or late-model fuel delivery systems into classic vehicles, or when upgrading from -16 to -20 lines during high-flow fuel pump installations. The compact footprint (2.35 x 2.25 x 5.55 inches) fits tight underhood spaces without requiring bulkhead relocation. Weighting only 0.33 lbs, it adds negligible mass while maintaining full thread engagement and sealing integrity when paired with Teflon tape or AN-compatible sealant.