Aluminum 90 Female 1/8in NPT to -4an Male

The Aluminum 90 Female 1/8in NPT to -4AN Male adapter from QUICKCAR RACING PRODUCTS is an essential fluid-line fitting for high-performance fuel, coolant, and oil system builds. This 90-degree elbow connector bridges legacy 1/8-inch NPT gauge ports on engines and fuel rails to modern -4 AN (JIC) fittings, making it indispensable for custom fuel injection tuning, engine management upgrades, and precision cooling system diagnostics. Whether you're installing an aftermarket fuel pressure gauge, adapting OEM ports to AN plumbing, or fabricating a custom fuel cell system, this fitting eliminates expensive custom hose fabrication and ensures secure, leak-free connections.

Constructed from aerospace-grade aluminum with black anodized finish, this adapter resists corrosion while maintaining light weight—critical for high-vibration engine bays and competition vehicles where fatigue failure is a concern. The 90-degree configuration allows tight routing around cylinder heads, intake manifolds, and firewall passages where straight fittings create installation conflicts. The female NPT inlet accepts standard 1/8-inch gauge sender threads, while the male -4AN outlet connects directly to crimped or reusable AN hose without additional adapters, reducing leak points and pressure drop in fuel and coolant circuits.

Professional engine builders, fuel system integrators, and DIY modifiers rely on this fitting for LS swaps, turbo installations, and EFI conversions where factory port locations don't align with performance plumbing standards. The compact 3.5 x 1 x 4.5-inch profile fits tight underhood spaces, and the lightweight 0.04 lbs construction adds negligible mass to fuel or cooling systems. Thread sealant (PTFE tape or pipe dope) on the NPT inlet creates a positive seal, while the -4AN barb maintains industry-standard AN compression fittings compatible with Earls, Russell, and AN-spec hoses.