Aftermarket New Old Reproduction Stock Heater Water Control Valve for all 74-78 C-Bodys with ATC, (Auto Temperature Control). Replaces OEM Part #’s 3503250, 3503784, 3837627 and 3503778 which were all Supersceded to each other by Chrysler. Most of these will have some Light Corrosion on them that will not harm the Function of it. These look identical to the Factory Valve, but without the Pentastar and OEM Part # on it. Made by Stant.