#12 Female To #6 Reducer

The #12 Female to #6 Reducer from EARLS is an essential fitting for custom fuel system builds, hydraulic brake lines, and precision fluid transfer applications where port size compatibility is critical. Whether you're assembling a high-performance fuel injection system, upgrading a classic car's cooling circuit, or building a custom hydraulic brake setup, this adapter bridges the gap between larger #12 ports and smaller #6 connections. Professional mechanics and enthusiasts rely on this fitting to maintain system integrity while allowing flexible component sourcing and efficient plumbing layouts.

Engineered by EARLS, a trusted leader in automotive fluid management systems, this reducer maintains flow efficiency and pressure integrity across port transitions. The stepped design ensures secure, leak-free connections when paired with properly sized hose barbs or JIC fittings on both ends. Compact dimensions (3.15 × 1.7 × 3.65 inches) and minimal weight (0.09 lbs) mean this fitting integrates seamlessly into tight engine bays without adding complexity or bulk. The precision-machined construction handles both fuel and coolant applications, making it a versatile component for street rods, race cars, and restoration projects.

Installers benefit most when adapting existing fuel rails, intake manifold coolant ports, or transmission cooler lines without full system overhauls. The #12 Female to #6 Reducer works with both braided stainless steel hose and traditional rubber lines, provided fittings match AN port specifications. Installation requires only basic hand tools and is completed in minutes—ideal for mid-build modifications or emergency system repairs. Always verify port thread types (NPT, JIC, or O-ring) before purchase to ensure compatible seating and prevent leaks under operating pressure.