Replacing my intake manifold gasket. Any advice on what brand to buy? Read somewhere that ford made some changes to the gaskets based upon some research, i.e. they made one side thicker than the other. So they recommended OEM. Not sure if that is true or not. Was going to get the Fel-Pro. They have one for around 30-40 dollars and another around 80 dollars. Not sure what the difference would be. I have a 2001 Ford Expedition 5.4L. Eddie Bauer. Any help from those who have had experience with this would be appreciated. Thanks