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

The 8AN STR Male Adapter 3/4in NPT Male in blue anodized aluminum is a precision hose fitting engineered for high-performance fuel, oil, and coolant system plumbing in custom and modified vehicles. This straight adapter bridges two critical connection standards—8 AN (American National) hose size and 3/4-inch National Pipe Thread (NPT)—making it indispensable for engine builders, fuel system installers, and serious automotive enthusiasts upgrading factory plumbing to aftermarket fuel rails, coolers, or remote filters. The blue anodized finish provides both visual identification and corrosion resistance in demanding engine bay environments.

REDHORSE PERFORMANCE manufactures this adapter from quality aluminum with precision machining to exact AN specifications, ensuring leak-free connections under sustained pressure and temperature cycling. The straight configuration eliminates flow disruption at the junction point, critical for fuel delivery consistency and oil pressure accuracy in turbocharged or supercharged applications. The NPT male thread accommodates aftermarket engine blocks, manifolds, and component ports designed to the industrial NPT standard, while the 8AN male end accepts standard braided hose or hard-line fuel line fittings rated for high-velocity fuel injection systems, boosted engine oil circuits, and high-temperature coolant loops.

Street and track builders benefit most from this adapter when retrofitting LS-engine swaps, modern fuel injection systems, or redundant cooling circuits where NPT-threaded ports are already present on custom or late-model engine blocks. Installation requires standard wrenches and thread-sealant compound rated for the fuel or coolant application; tightness prevents weeping under pressure spikes common in forced-induction tune-ups. This adapter is compatible with all REDHORSE hose lines and fittings in the 8AN range and integrates seamlessly into braided or hard-line fuel systems, remote oil filtration setups, and auxiliary cooler circuits where NPT-to-AN conversion is unavoidable.