AN Expander #3 Female x #4 Male

The AN Expander #3 Female x #4 Male from Triple X Race Components is a straight-through hydraulic and pneumatic adapter fitting designed to connect different AN port sizes in high-flow systems. This black-anodized aluminum adapter allows a #3 AN female port to mate securely with a #4 AN male connection, making it essential for custom fuel system layouts, brake line configurations, and pressurized fluid distribution networks where port size transitions are required.

Constructed from aircraft-grade aluminum and finished in black anodize, this fitting provides corrosion resistance and maintains structural integrity under sustained pressure and thermal cycling. The straight-through design ensures minimal turbulence and pressure loss across the transition, critical in applications where consistent flow rate or system response time directly impacts performance. Weighing only 0.03 lbs, the compact form factor (1.95 x 0.65 x 2.7 inches) allows flexible integration into space-constrained engine bays and chassis configurations without adding measurable bulk to fuel, coolant, or brake systems.

This adapter is purpose-built for racing and performance automotive applications where system designers need to adapt between different AN port standards. It serves motorsports builders, off-road fabricators, and high-performance street builders who are integrating components from different manufacturers or expanding existing fuel delivery and brake system architectures. The #3-to-#4 transition accommodates systems that blend smaller-gauge supply lines with larger return or cooling circuits.

Triple X Race Components specializes in precision hydraulic adapters and fluid system components engineered for consistent performance across demanding environments. Each fitting is manufactured to tight tolerances to ensure leak-free connections and compatibility with standard AN port threads, allowing builders confidence in system reliability during both development and sustained operation.