Male Adapter Fitting #6 x 18mm x 1.5 FI

The FRAGOLA Male Adapter Fitting #6 x 18mm x 1.5 FI is a precision straight adapter designed to connect AN-format fuel injection systems to metric threaded components. This blue anodized aluminum fitting bridges a 6 AN male port to an 18mm x 1.5 metric male port, making it essential for custom fuel system builds, performance engine conversions, and high-pressure fuel injection plumbing where direct metric coupling is required.

Constructed from lightweight aluminum and anodized blue for corrosion resistance, this adapter provides a leak-free connection in fuel injection applications where standard SAE fittings cannot accommodate metric threadforms. The straight configuration eliminates flow disruption common to 90-degree or 45-degree adapters, maintaining consistent fuel delivery pressure and minimizing turbulence in the fuel line. At just 0.04 lbs, it adds negligible weight to the fuel system while the compact 3.45 x 1 x 4.55-inch profile fits tight engine bay installations typical of aftermarket fuel system retrofits.

This adapter is ideal for builders integrating metric fuel injectors, regulators, or distribution blocks into AN-plumbed fuel systems—a common requirement in engine swaps, turbo conversions, and custom fuel management setups. It serves applications where OEM metric fuel components must interface with aftermarket AN hardline systems without sacrificing flow rate or system reliability. Each adapter is sold individually, allowing builders to source exactly the fittings needed for their specific plumbing configuration.

FRAGOLA fittings are widely recognized in the performance fuel system market for consistent quality and pressure rating. This particular adapter (MPN 491964) meets the dimensional and thread specifications required for safe, repeatable fuel delivery in high-performance and motorsport applications where precision fitment is non-negotiable.