10AN to 12AN 3/4NPT Straight Male to Male

The REDHORSE PERFORMANCE 10AN to 12AN 3/4NPT Straight Male to Male adapter is an essential hydraulic fitting for custom fuel systems, oil cooler circuits, and performance cooling applications. As a mechanic who routinely builds high-output engine platforms, you'll recognize this as a critical component for transitioning between different hose sizes and port standards without leaks or flow restrictions. This straight male-to-male configuration allows you to connect two separate lines or components that use mismatched AN and NPT sizing, making it indispensable for turbocharged builds, fuel system upgrades, and custom plumbing scenarios where off-the-shelf solutions don't fit your layout.

Engineered by REDHORSE PERFORMANCE, a trusted name in racing and street-performance hydraulic systems, this adapter converts 10AN male threads to 12AN male threads while accommodating a 3/4-inch NPT port on one end. The straight-flow geometry minimizes turbulence and pressure drop compared to 90-degree elbows, critical when fuel delivery or cooling efficiency directly impacts horsepower and reliability. Precision-machined construction ensures zero clearance and consistent sealing across repeated assembly and disassembly cycles—a requirement when you're chasing tenths on the dyno or debugging a freshly built engine platform. The compact 2.75-inch length fits tight engine bays without requiring custom routing or secondary support brackets.

This adapter is ideal for builders transitioning legacy or mixed-source components into a cohesive fuel delivery or cooling system. Street machines, drag cars, and track-focused builds frequently encounter mismatched port standards when upgrading fuel pumps, regulators, coolers, or braided-line assemblies. Installation is straightforward: hand-tighten initially, then use appropriate wrenches for final seating—avoid over-torquing, which can damage NPT threads. Pair this with quality hose clamps and braided lines rated for your fuel pressure or coolant temperature to ensure long-term reliability under load.