6AN 5/16 Push On EFI Adapter Blue

The REDHORSE PERFORMANCE 6AN 5/16 Push On EFI Adapter in Blue is a precision straight-flow fitting engineered for fuel injection systems, custom fuel rail applications, and high-performance engine builds. This quick-disconnect adapter bridges 6 AN male ports to 5/16-inch hose barb connections, offering a direct, leak-resistant fluid pathway with no flow restrictions—critical when every PSI and fuel delivery precision matters in turbocharged, supercharged, or race-prepared engines.

Constructed from lightweight aluminum with blue anodized finish, this adapter combines corrosion resistance with minimal weight penalty—important in engine bays where thermal cycling, fuel vapors, and moisture create hostile environments. The 6 AN male connection interfaces with industry-standard EFI fuel systems and carbureted applications, while the 5/16-inch hose barb provides a secure, positive connection to reinforced fuel line tubing. The straight fitting geometry eliminates turbulence and pressure drop, preserving fuel system stability across varying RPM and boost conditions. Anodized finish protects against oxidation while providing visual identification in complex plumbing layouts.

This adapter is essential for builders transitioning carbureted fuel systems to fuel injection, upgrading to higher-capacity pumps, or integrating auxiliary fuel lines in forced-induction applications. It serves fuel cell installations, swap engine fuel rails, turbo fuel supply lines, and any scenario requiring a compact, reliable connection between AN-sized manifold ports and hose-barb tubing. Individual unit sold—verify your fuel system's working pressure and line diameter before installation to ensure safe, compliant operation.