I have a omc cobra sterndrive motor is a 350 5.7 boats a 1989 I took out the engine and noticed there are no flapper valves in the Y pipe so I ordered two part# 985749 with a cross of # 3853864 Thought they were the ones but they are way too tight will not slide down the pipe now i see there is another part number for a 1988 and its parts # 984467 is this diff than the one I ordered ? Size etc? does any one know anything about this? I and or which one I should use
