20AN Female - 16AN Male Reducer Black

The 20AN Female - 16AN Male Reducer Black by REDHORSE PERFORMANCE is an essential hydraulic adapter fitting designed to bridge port size mismatches in high-performance fuel systems, brake lines, and transmission cooler circuits. This reducer allows you to connect 20AN (AN20) female ports to 16AN (AN16) male lines, a critical capability for custom engine builds, fuel system upgrades, and turbocharger installations where OEM and aftermarket components use different AN sizing standards. Whether you're plumbing a carbureted engine fuel system, upgrading to a high-flow fuel injection setup, or installing remote oil filtration on a built motor, size compatibility is non-negotiable for system integrity and leak-free operation.

Manufactured by REDHORSE PERFORMANCE, a trusted name in motorsports hydraulic solutions, this reducer features a black anodized aluminum body that resists corrosion and blends seamlessly into modern engine bays. The 20AN Female - 16AN Male configuration uses proven JIC flare seat geometry and precision-machined ports to ensure rock-solid seals under pressure cycling—critical in turbocharged and supercharged applications where fuel pressure regularly spikes above 80 psi. Compact at just 3.825 inches in length and 0.205 lbs, the fitting installs inline with minimal space consumption, making it ideal for tight engine compartments where real estate is at a premium. The black finish not only protects against oxidation but also maintains a professional appearance in visible fuel system layouts.

This adapter is indispensable for performance builders, diesel technicians, and street rod enthusiasts working with mixed hydraulic line standards. Use it to adapt newer fuel rails with 20AN female ports to legacy fuel supply lines, or to downsize fuel pressure regulators and filters that only feature 16AN outlets. Installation is straightforward with standard -20 and -16 AN wrenches; apply thread sealant to the male end and torque to approximately 25 foot-pounds for a lasting seal. Verify your fuel system pressure rating and component compatibility before installation to ensure all connected components share equivalent pressure ratings.