Reproduction zinc intake manifold heater hose water connection fitting for various 1963-79 Ford and Mercury models with 352 360 390 427 and 428 big-block FE engines. Popular applications include Mustang Fairlane Cougar and F-Series Truck. The threaded portion of the elbow attaches the intake manifold inlet and the hose barb end attaches to the heater hose that runs to the core. Original gold style zinc finish. 4 1/2 Overall Length. Replaces OE part # C8AZ-18599-A.Specifications3/8 NPT thread5/8 Hose barb3/8 Opening at manifold endNote: Some aftermarket intake manifolds use a larger thread size for the heater hose fitting. Please check the thread size to insure you are ordering the correctly.