Sierra 18-7720 Fuel Filter The Sierra 18-7720 Fuel Filter is interchangeable with the following: Honda 16900-SR3-004, Mallory 9-37951. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Fuel Filter Meets or exceeds the original equipment quality Sierra part number: 18-7720 Interchangeable with the following: Honda 16900-SR3-004, Mallory 9-37951