Originally Posted by jawknee5
so obviously the larger hole would be the direction you would want the water to flow into, and the smaller hole the water to flow out of?
That sir I couldn't tell you with out looking at the part.
You get some pics of it on both ends up on here and Ill give you a better analyses lol .
I would say that if the hole tapers to a smaller hole then you would want the biggest end to go away from the intake so you don't create a nozzle effect.
Also make sure that restrictor is defiantly on the hose that feeds the heater core other wise it will create a restriction and defeat the whole purpose of the part.