Using this FASS fuel filter pack is easy. First, make sure to replace the old filters with the new ones as per the instructions. The XWS - 3002 should go on the pressure side of the pump, and the PF - 3001 on the suction side. You can check the location diagram on the filters for correct placement. As for maintenance, these filters have a 25,000 - mile life expectancy. Keep an eye on your mileage and replace the filters when it's time. Remember, the new XWS - 3002 must be used together with the PF - 3001. Don't try to use them in combination with the FF - 3003/FF - 3010 or FS - 1001/FS - 1020, as it won't work properly. This will ensure your FASS Fuel System runs smoothly and efficiently.