Reducer AN -8 Female to -4 Male

The Reducer AN -8 Female to -4 Male from ALLSTAR PERFORMANCE is a straight-flow hydraulic and fuel system adapter engineered for custom fuel injection setups, high-performance cooling circuits, and precision fluid distribution in modified vehicles. Built for mechanics and engine builders who demand reliability under pressure, this fitting bridges two different AN (Army-Navy) line sizes—a common necessity when downsizing hose runs or connecting mismatched OEM and aftermarket components. Whether you're fabricating a custom fuel rail, integrating a new intercooler loop, or consolidating brake fluid lines on a race car, this adapter ensures leak-free connections without requiring costly hose reconfiguration.

Machined from aerospace-grade aluminum and finished in black anodizing, the Reducer AN -8 Female to -4 Male resists corrosion and abrasion in engine bays and fuel cell compartments. The straight design eliminates turbulence and pressure loss compared to 90-degree alternatives, critical for fuel pressure stability and flow rate consistency. The female swivel inlet (AN -8 port) rotates freely to accommodate tight hose routing, while the fixed male outlet (AN -4 port) threads directly into manifolds, carburetors, or fuel distribution blocks. ALLSTAR PERFORMANCE's manufacturing tolerances ensure precise thread engagement and repeatable seal performance across multiple install cycles—essential for competitors and street builders alike.

This reducer fits seamlessly into EFI fuel systems, nitrous oxide delivery networks, coolant bypass circuits, and brake line assemblies on street rods, drag racers, and road course platforms. Weighing just 0.07 lbs, it adds minimal mass to engine bay installations. Proper AN hose sizing and JIC thread sealant (never PTFE tape alone on swivel fittings) ensure years of vibration-free service. Mechanics commonly use the Reducer AN -8 Female to -4 Male when consolidating multiple small-diameter runs into a single larger feeder line, reducing connection points and improving system cleanliness—a proven technique in fuel contamination reduction and leak mitigation on high-boost builds.