Y Adapter Fitting -16AN x dual -16AN

The Y Adapter Fitting -16AN x dual -16AN (Vibrant Performance MPN 10815) is a precision flow-distribution component designed for high-performance fuel, coolant, and brake system applications where a single inlet line must split into two outlet paths. Whether you're building a twin-fuel-injector setup, upgrading to dual-feed cooling lines, or installing a proportioning brake valve configuration, this adapter provides a reliable junction point that maintains system integrity under demanding conditions. Mechanics and fabricators rely on Y adapters like this for custom fuel system builds, racing applications, and modified cooling circuits where stock single-feed designs prove inadequate.

Constructed with precision-machined aluminum or ductile iron internals, the Y Adapter Fitting features SAE -16AN threaded ports that use industry-standard JIC 37-degree flare connections—the same specification found on OEM performance systems and aftermarket racing hydraulic lines. The dual-outlet design splits flow equally when inlet and outlet pressures are balanced, making it ideal for symmetrical fuel distribution to paired injectors or dual carburetor feeds. Vibrant Performance's engineering ensures minimal turbulence at the junction, critical for maintaining fuel atomization and preventing cavitation in high-speed circuits. The compact 5 x 1.5 x 9-inch form factor allows installation in tight engine bays, while the 0.6-pound weight adds negligible parasitic mass.

This adapter suits fuel system upgrades on LS-platform swaps, carbureted restorations with dual-feed requirements, and modern EFI conversions using aftermarket fuel rails with split-feed configurations. It integrates seamlessly with braided stainless steel -16AN hose assemblies and standard -16 AN push-lock connectors commonly used in high-performance fuel systems. Installation requires only standard SAE wrench sizes and Teflon tape or thread sealant on the inlet port; dual outlet ports receive fuel lines or hard-line fittings depending on your plumbing layout. Verify clearance in your engine bay before purchase, as the adapter's compact profile still demands checking against radiator hoses, valve covers, and intake manifolds in tight configurations.