Billet 1/8 NPT Ports Universal 16AN -20AN Raised Inline Filler Neck Cap 1.5” CNC

Fix common cooling system bleeding issues especially on engine swaps. This filler neck raises the fill point above the cylinder head and heater core, helping eliminate trapped air and improving system performance. • Raises fill point 3.75” (95.25mm) • Total height: 5.25” (133.35mm) Installs by welding to the upper water neck or using a short hose connection. Features • CNC 6061 billet aluminum • Black anodized finish • Uses Type A radiator cap • 1/8” NPT overflow port Dual 1/8” NPT ports (both sides): For temp sensors, fan switches, etc. (includes plugs) -20AN ORB inlet/outlet with adapters: • 1.38” hose • 1.5” hose • -16AN (1”) • -20AN (1.25”) Fitment • Universal works with most setups & engine swaps