AN Female to Male Reducer & Expander Adapter Fittings

Build your perfect AN plumbing system with our precision-machined AN Female to Male Reducer and Expander Adapter Fittings. These adapters are the ideal solution for stepping your AN fittings up or down—allowing smooth transitions between hose sizes when building or modifying a fuel, oil, or transmission system.

How These Adapters Work

Whether you're working with fuel lines, transmission coolers, or oil systems, plumbing often requires connecting different AN sizes. These adapters let you reduce or expand your AN connection while maintaining a leak-free, professional-grade seal.

Choose from:

• -10AN Male to smaller or larger AN female sizes
• -8AN Male to smaller or larger AN female sizes
• -6AN Male to smaller or larger AN female sizes

For example, adapt a -10AN fuel filter to a -8AN hose, or step up a -6AN regulator port to a -8AN line—these fittings give you complete control over your setup.

Product Features:

• Black anodized aluminum for corrosion resistance and durability
• Male AN threads on one end, female AN threads on the other
• Seamlessly integrates with Hot Rod AN PTFE hose and fittings
• Compatible with fuel, oil, coolant, and transmission fluid systems
• Available in reducer and expander combinations for -6AN, -8AN, and -10AN base sizes

Common Applications:

• Fuel system conversions and upgrades
• LS swaps and EFI retrofits
• AN hose size mismatches in custom plumbing projects
• Connecting inline fuel filters, pumps, or regulators

Why Use Reducers and Expanders?

Not every component in your system will match hose size exactly. These AN female to male adapters remove the guesswork, eliminate the need for bulky transition hoses, and provide a cleaner, safer, and more professional finish to your build.

Related Products:

• PTFE Hose End Fittings
• Hose & Fittings Bundles
• Other AN Adapter Fittings
• Installation Instructions

Need Help Choosing the Right Adapter?

Not sure if you need a reducer or an expander? Let us help you sort it out. Use our Fuel System Build Request Form or Contact Us and we’ll guide you to the correct fitting for your specific build.