Expander AN -6 Female to -8 Male

The Expander AN -6 Female to -8 Male fitting from ALLSTAR PERFORMANCE is an essential adapter for serious fuel system and hydraulic line work on high-performance vehicles. This stepped expander is designed for mechanics and fabricators who need to transition between two different AN (Army-Navy) hose sizes while maintaining full flow capacity and system integrity. Whether you're building a custom fuel delivery system, upgrading brake lines, or adapting existing plumbing to accommodate larger diameter hoses, this compact adapter bridges the size gap efficiently.

This AN adapter functions as a direct stepped transition between -6 and -8 size fittings, allowing you to connect smaller -6 diameter hoses or lines to larger -8 ports without requiring multiple adapters or compromises in pressure handling. The female inlet accepts -6 connections while the male outlet threads onto -8 ports, creating a straightforward, leak-free joint when properly installed with appropriate PTFE tape or thread sealant. Precision-engineered aluminum construction ensures durability under the pressure cycles common in performance fuel systems, while the compact 4.05-inch length keeps under-hood plumbing layouts neat and organized.

Fabricators and engine builders working on fuel-injected engines, turbocharged systems, and high-flow applications benefit most from this adapter's straightforward design and reliable performance. Installation is straightforward—thread the male end into the -8 port using a wrench and secure the female inlet to your -6 hose fitting with a hose clamp or AN wrench depending on your setup. This expander is compatible with standard AN hose sizing across domestic and import platforms, making it invaluable for custom fuel rails, remote fuel filters, and auxiliary cooling systems where size transitions are unavoidable.