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FASS Fuel Systems HD Series replacement pumps will help restore your fuel/air separation system to optimum performance levels. They require no removal of the filter assembly to install—only the replacement of the pump housing. These heavy-duty pumps are easy to install, with a pump housing, motor, and T-block assembly included. They offer the easiest fuel system repair you could want, with no plumbing required. Order the model designed to replace your original equipment.