Female to Male Expander Adapter; Female -4 to -6

The VIBRANT PERFORMANCE Female to Male Expander Adapter is a precision-engineered hydraulic fitting designed for custom fuel, oil, coolant, and brake line systems. This adapter is essential for builders who are upgrading or reconfiguring fuel delivery, cooling, or auxiliary fluid systems in high-performance vehicles, race cars, and modified street machines.

Manufactured to VIBRANT PERFORMANCE's exacting standards, this adapter features precision-ported internal passages that maintain full flow while stepping up the line size, minimizing turbulence and pressure loss across the transition. The JIC-style female inlet and male outlet are machined from aircraft-grade aluminum alloy, ensuring reliable connections for both -4 AN hose fittings and -6 AN connections.

This expander adapter is invaluable for fuel system upgrades, auxiliary coolant distribution, turbo feed and return lines, and is designed for tight engine bay applications where space is critical. Its compact footprint and lightweight design make it a perfect choice for serious build projects.