WIX Filters - 33736 Heavy Duty Spin On Fuel Water Separator, Pack of 1 -Make sure this fits by entering your model number. -Pleated paper filter Wix Spin-On Fuel Filters are designed to protect fuel system components and absorbs contaminants from gasoline vapor in the fuel. They have a built-in gasket which prevents leakage of the fuel under compression loads. These filters withstand minimum internal differential pressure of 75psi.