Convert your 4.6L 2V/3V/4V or 5.4L 2V/3V/4V water return to AN fitting compatibility using our precision-machined -10AN nipple. Engineered with tight tolerances to fit snugly into your engine block just like OEM components, this nipple lets you transition from factory plumbing to a fully custom AN-fitted cooling system. Perfect for builds that demand a professional, integrated look with all-AN fittings throughout.
