#4 45 Degree Hose End

The #4 45 Degree Hose End is a precision-engineered hydraulic fitting designed for high-performance fuel, coolant, and fluid transfer systems in serious automotive builds. This 4 AN hose end connector is essential for fabricators, engine builders, and modification enthusiasts who demand reliability in custom fuel rails, turbo plumbing, transmission cooling lines, and pressurized fluid circuits. Built to AEROQUIP's exacting standards, this fitting eliminates leaks and system failures that plague poor-quality alternatives—critical when boost pressures, fuel injection demands, or track-day heat loads stress every component.

The 45-degree angle geometry allows routing flexibility in tight engine bays where straight fittings create packaging conflicts—a common challenge in turbocharger manifold setups and mid-engine conversions. The aluminum and steel construction with red anodized and silver finishes provides corrosion resistance in underhood and fuel tank environments while maintaining visual integrity in show-quality builds. The 4 AN female connection interface accepts industry-standard #4 hose and fittings, ensuring compatibility across fuel system upgrades, cooling modifications, and power steering retrofits. AEROQUIP's proven Startlite design delivers consistent flow with minimal turbulence and pressure drop—essential for maintaining fuel pressure stability at peak RPM and preventing cavitation in high-demand circuits.

Professional mechanics, LS-swap fabricators, and performance engine builders rely on the #4 45 Degree Hose End for custom fuel system assembly, nitrous oxide delivery lines, and coolant bypass plumbing on heavily modified platforms. This fitting integrates seamlessly into braided AN hose runs and works across naturally aspirated, supercharged, turbocharged, and fuel-injected systems requiring pressures from idle vacuum circuits to 300+ PSI applications. Installation requires standard SAE wrenches and basic plumbing literacy; proper dry-break or quick-disconnect usage extends service life. For precision builds where fuel leaks mean downtime or worse, the AEROQUIP #4 45 Degree Hose End delivers the durability and leak-free performance that separates professional fabrication from DIY compromise.