AN Male Reducer #4 x #12

The AN Male Reducer #4 x #12 is a straight adapter fitting designed for high-pressure hydraulic and fuel system applications where line size transitions are required. This aluminum reducer connects a smaller 4 AN male port to a larger 12 AN male port, making it essential for custom fuel delivery systems, racing engines, and performance hydraulic circuits. Whether you're building a competitive race car, restoring a vintage machine, or upgrading an industrial hydraulic system, this fitting provides a reliable solution for mismatched port sizes without requiring complex fabrication.

Manufactured from aluminum and finished in black anodize, the AN Male Reducer #4 x #12 offers both corrosion resistance and visual integration with modern engine bays. The black anodized coating protects against oxidation while providing a professional appearance that complements contemporary build aesthetics. Triple X Race Components engineers these adapters to strict AN (Army-Navy) thread specifications, ensuring leak-free connections under extreme pressure and temperature cycling. The straight design eliminates unnecessary elbows in your line routing, reducing pressure drop and simplifying installation geometry in compact engine compartments.

This reducer is ideal for professional fabricators, race teams, and experienced enthusiasts working with fuel injection systems, turbocharger feed lines, and custom cooling circuits. Installation requires no special tools beyond a standard AN wrench set; thread the #4 AN male end into your smaller port and the #12 AN male end into your larger component. Verify your system pressure rating does not exceed the component specifications, and use quality thread sealant rated for your fluid type to ensure reliability across thermal cycling and vibration.