The Willison Products FUPRO (Fuel Protection) Isuzu Diesel Filtration System, No. IS1W, is designed to prevent vehicle damage from bad fuel or water. The system uses a two-micron filter separator and either a gauge or lamp to monitor when filter service is needed, and it's warning point is always enough in advance of service need time that the operator can safely get to a safe place to service his filter. All of the Isuzu Diesel Filtration Systems come in kit form with all necessary items included for easy installation. They also come with detailed instructions.