16AN Female to 20AN Male Expander Black

The 16AN Female to 20AN Male Expander Black from REDHORSE PERFORMANCE is an essential hydraulic adapter for builders stepping up fuel line, coolant, or brake circuit sizes in high-performance engine builds. Whether you're transitioning from a smaller-diameter feed line to a larger distribution manifold or upgrading your cooling system for forced-induction applications, this expander fitting bridges the gap between 16-AN and 20-AN ports without requiring costly custom hose assemblies.

It's a straightforward solution that saves time during complex plumbing layouts and ensures leak-free operation under pressure. REDHORSE PERFORMANCE expander fittings are precision-machined from aluminum and finished in corrosion-resistant black anodize, designed to withstand the flow demands and pressure spikes of turbocharged, supercharged, and naturally aspirated performance engines.

Professional engine builders, LS and big-block swap specialists, and custom cooling system fabricators rely on this adapter when consolidating multiple smaller feed lines into a single larger distribution point. The female 16-AN port accepts standard push-lock or swaged hoses on the inlet side, while the male 20-AN outlet threads directly into manifold ports or distribution blocks without adapter stacking.