Quantum Fuel Pump Strainer Only Harley-Davidson Heritage Springer (FLSTS) 2001-2006 (QTY 3)Category: Flsts Heritage SpringerWhy is it important to replace your fuel pump strainer regularly, even thoughyour fuel pump is functioning perfectly fine?Thefuel pump strainer (also known as pre-filter or fuel sock) is a fuel system'sfirst line of defense against fuel system contamination; including dirt, dust,or other fine particles found in regular pump gasoline.Gasoline also has a tendency to varnish over time, leaving a thick filmy layerover everything inside the tank--from the fuel pump internals, to the tankwalls, and especially the strainer / pre-filter. A varnished or cloggedstrainer restricts flow, forcing the fuel pump to work harder, which affectspump longevity. Without a doubt, fuel tank varnishing and strainer clogging arethe #1 causes of fuel pump failure. For powersports applications where themotor is not run every single day like an automotive vehicle, fuel pumpstrainers should be replaced every year, as inexpensive preventativemaintenance. Additionally, if the motor will not be used for any extendedperiod of time, we highly recommend adding a bottle of fuel stabilizer to thetank, and running the motor for a few minutes to circulate the fuel stabilizerthroughout the system.