The PFF5510 gasoline fuel filter/water separator replaces standard fuel filters. It fits these popular engine applications with it\'s 11/16\"-16 center threads and features 10 micron Aquabloc® II media to outperform other gasoline fuel filters in inboard or outboard, two or four cycle applications. Performance exceeds all OEM requirements. Suitable for all low or high pressure injection systems. A high performance filter element that is treated inside and out with a highly corrosion resistant coating.