WIX Filters - 33299 Heavy Duty Fuel (Complete In-Line Sep 17, 2018Wix Complete In-Line Fuel Filters are designed to protect fuel system components from contaminants in the fuel. They are made of pleated papers which prevents leakage of the fuel under compression loads. These filters withstand minimum internal differential pressure of 75psi.4.4/5(15)Price: $10Brand: Wix Fuel Filters - Inline Fuel Filter Style - 1/2 in. NPT Find Fuel Filters with Inline Fuel Filter Style and 1/2 in. NPT Inlet Size and get Free Shipping on Orders Over $99 at Summit Racing!