AN Y Adapter Fitting – Split or Combine Fuel Flow with Precision

Streamline your fuel system with our high-quality AN Y adapter fittings, designed to efficiently split or combine fluid flow in performance automotive, racing, and industrial fuel systems. Whether you're feeding dual fuel rails from a single supply line or merging two return lines into one, this Y-fitting makes complex plumbing easy and reliable.

Optimize Fuel Delivery in High-Performance Builds

Our AN Y adapter fittings are commonly used in advanced EFI fuel systems, especially in LS swaps and modern performance engines where dual fuel rails are utilized. Instead of running a messy crossover between rails, the Y adapter lets you feed both banks directly from one line—clean, symmetrical, and efficient.

Constructed from high-strength aluminum and designed to handle the high pressures and temperatures of today’s engines, these Y adapters ensure leak-free operation and consistent flow where it matters most.

Common Uses:

• Split one fuel feed line to supply dual fuel rails (ideal for LS swaps)
• Combine dual return lines into a single AN return to the tank
• Manage nitrous fuel delivery setups
• Use in custom cooling or oil circulation systems

Why Choose Our AN Y Fittings?

• Efficient Fluid Management – Optimized flow paths to prevent restriction
• Leak-Free Performance – Engineered to handle high fuel pressures
• Clean Installation – Eliminates messy crossover plumbing and bulky tees
• High-Temp Durability – Compatible with gasoline, ethanol, methanol, and oils

Available Sizes:

• AN6 – Perfect for return lines and lower-volume fuel feeds
• AN8 – Commonly used for high-performance fuel feeds
• AN10 – Ideal for high-flow fuel systems or return setups

Tech Specs:

• Material: Lightweight CNC-machined aluminum
• Finish: Anodized for corrosion resistance and durability
• Thread Type: AN / JIC (37° flare)
• Configuration: Single inlet to dual outlet, or dual inlet to single outlet
• Fuel Safe: Yes – works with gasoline, ethanol, diesel, and oil

Installation Tip:

For best results, use with PTFE AN hose ends and matching hose bundles to ensure maximum sealing and flow consistency across your entire system. Y adapters should be securely mounted or supported in high-vibration areas to prevent stress on fittings.

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Need Help Planning Your AN Plumbing Setup?

Contact our team or use the custom build request form to get expert guidance on building a clean, high-performance fuel system tailored to your project.