Straight Adapter Fitting -8AN x 1/4in NPT

The Vibrant Performance Straight Adapter Fitting -8AN x 1/4in NPT (part number 10219) is a precision aluminum adapter designed to bridge 8 AN male ports to 1/4 inch NPT male connections. This straight-flow design maintains clean fluid pathway geometry, eliminating turbulence and pressure drop across the transition. The black anodized aluminum construction resists corrosion while remaining lightweight, making it ideal for high-performance fuel systems, cooling loops, and pneumatic applications in motorsports, custom fabrication, and industrial setups where direct port conversion is required.

The -8AN (AN8) port standard operates at nominal 1/2-inch outer diameter with a specific thread pitch and sealing geometry optimized for high-pressure applications, while the 1/4 inch NPT (National Pipe Thread) connection provides industry-standard compatibility with compressors, gauges, manifolds, and aftermarket components. The straight configuration eliminates the sharp direction change found in 90-degree fittings, reducing stress concentration at the fitting body and improving flow characteristics under load. Black anodized finish on 6061-series aluminum balances weight savings against durability, though periodic inspection is recommended in salt-air or chemically corrosive environments where anodize integrity may degrade over time.

This adapter serves custom fuel system builders, EFI retrofit installations, turbo intercooler piping, and vacuum/boost distribution architectures where existing port configurations require conversion to standard NPT threads. It is commonly specified in engine bay plumbing where space is limited and direct connections between -8AN feed lines and NPT-threaded take-offs—such as fuel pressure regulators, catch cans, or supply manifolds—eliminate the need for bulky angled fittings or custom fabrication. The compact footprint (3.25 × 0.95 × 3.6 inches, 0.04 lbs) suits tight installations typical of modern performance and restomod applications.