8AN STR Male Adapter 3/4in NPT Male Blue

The 8AN STR Male Adapter 3/4in NPT Male in blue anodized aluminum is a critical fitting for any serious automotive fuel system, cooling system, or hydraulic line upgrade. This straight adapter bridges the gap between SAE -8 hose connections and 3/4-inch National Pipe Thread (NPT) ports, making it essential for custom fuel rail installations, turbo cooling loops, and transmission cooler plumbing on modified engines. Whether you're building a high-performance street car, a track-focused platform, or integrating aftermarket components into an OEM bay, this adapter ensures leak-free connections that withstand sustained pressure cycles.

Manufactured by REDHORSE PERFORMANCE, a trusted name in motorsports plumbing, this adapter features SAE -8 sizing (which equals 1/2-inch hose ID) and male 3/4-inch NPT threads on the port side. The blue anodized finish provides superior corrosion resistance and UV stability while allowing you to color-code your fuel, coolant, and brake lines for quick system identification during troubleshooting or future upgrades. The straight (STR) configuration minimizes turbulence in high-flow applications and simplifies installation where space constraints demand direct in-line fitting orientation. Anodized aluminum construction keeps weight minimal without sacrificing durability—critical for performance builds where every pound matters.

This adapter is ideal for tuners and mechanics upgrading factory fuel delivery systems to support larger injectors, higher boost pressures, or alternative fuel stocks on LS, 5.0 Coyote, 2JZ, and other popular swap platforms. Use it to convert NPT-threaded fuel block ports, cooler lines, and gauge ports to standardized AN hose for simplified rework and future modifications. Pair it with stainless steel braided -8 hose and compatible -8 female adapters to complete your custom circuit. Verify NPT port size on your application before ordering—standard 3/4-inch NPT is common on most aftermarket fuel rails and cooling manifolds, but always confirm thread pitch and diameter to ensure a secure, pressure-rated seal.