Sierra 18-7790 Fuel Filter Kit The Sierra 18-7790 Fuel Filter Kit is interchangeable with the following: Mallory 9-37954, Moeller 33319-10. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Fuel Filter Kit Meets or exceeds the original equipment quality Sierra part number: 18-7790 Interchangeable with the following: Mallory 9-37954, Moeller 33319-10