Fuel Filter And Fuel Line for Cars, Trucks & SUVs - AutoZone The gas lines and filters can become rusted and deteriorate over time, in which case you need to replace them before bigger problems arise. AutoZone stocks every fuel line and hose you need to repair your fuel system and be on your way.Fuel Filter · Fuel Hose Fuel Filters | Inline for Diesel, Small Engine Fuel filters are a must on any fuel system. Keep your carburetor or fuel injection system flowing freely. Most inline fuel filters have replaceable fuel filter elements. You should inspect and change your fuel filter element regularly. You can't build horsepower with fuel flow interrupted.