6AN Male to 12AN O-ring Port Adapter Black

The 6AN Male to 12AN O-ring Port Adapter Black from REDHORSE PERFORMANCE is a critical fitting component for custom fuel, coolant, and hydraulic systems in modified vehicles. This adapter bridges two different AN port sizes, allowing you to connect smaller 6AN hose lines to larger 12AN port receivers on fuel rails, manifolds, or engine blocks. Whether you're building a high-performance fuel system, upgrading your cooling circuit, or integrating aftermarket components, this adapter ensures proper flow capacity while maintaining system integrity across mixed hose sizes.

Constructed with precision engineering, the 6AN Male to 12AN O-ring Port Adapter features a robust black anodized aluminum or steel construction that resists corrosion and thermal cycling common in engine bays. The male 6AN end threads securely into the female 12AN port, while the integrated O-ring seal eliminates the need for additional Teflon tape, providing a leak-proof connection under pressure. The compact 2.85-inch length and lightweight 0.12-pound design make installation straightforward without adding bulk to your engine compartment, and the precision-machined threads ensure repeatable, reliable seating across multiple assembly and disassembly cycles.

This adapter is essential for builders working with LS swaps, turbo fuel system upgrades, and custom cooling loops where OEM port sizes don't align with aftermarket hose selections. Common applications include fuel distribution blocks, water pump bypass lines, and oil cooler circuits where size transitions are unavoidable. Installation is straightforward: simply thread the male end into your 12AN port by hand until snug, then tighten with a wrench to secure the O-ring seal. Verify compatibility with your specific manifold or port configuration before ordering, and always inspect O-rings for damage prior to installation to guarantee pressure integrity.