-6an to 3/8in NPT Alum Fitting

The -6AN to 3/8in NPT aluminum fitting from XRP-XTREME RACING PROD. is an essential adapter for high-performance fuel and coolant line systems. Designed for enthusiasts and professional mechanics building modified vehicles, this 45-degree adapter bridges different thread standards commonly found in engine bay plumbing upgrades. Whether you're integrating fuel injection systems, turbo cooling lines, or custom fuel rails, this fitting solves the mismatch between AN-style hose fittings and NPT port threads found on many aftermarket components and factory manifolds.

Machined from lightweight aluminum and finished in blue anodize, the 6AN male connector accepts braided stainless steel hose while the 3/8-inch NPT male thread engages standard pipe ports without secondary adapters. The 45-degree angle reduces installation complexity in tight engine compartments and minimizes stress on hose routing—critical when working around turbos, intercoolers, or custom headers. XRP's manufacturing ensures concentricity and seal integrity; the anodized finish resists corrosion in wet environments and under underhood heat cycles. Weighing just 0.07 lbs, it adds negligible mass while maintaining structural rigidity under pressure cycling.

Street and track builders benefit most from this adapter when retrofitting modern fuel delivery or cooling systems into classic platforms, or when connecting aftermarket fuel pressure regulators, distribution blocks, and remote filter housings. It pairs seamlessly with -6AN braided hose (common in LS swaps, turbo conversions, and fuel system upgrades) and threads directly into 3/8" NPT bosses found on cylinder heads, manifolds, and adapter plates. Installation requires standard 1.5-inch wrench engagement; apply thread sealant to the NPT end for leak-free operation under boost or high coolant flow. This single fitting eliminates the need for multiple reducers or non-standard solutions when bridging AN and NPT standards.