Industry leading gasoline fuel filter assembly for high horsepower inboards and outboards High-performance fuel injected engines require ultimate water separation, fuel filtration and maximum fuel flow. Sierra's fuel filter assemblies deliver all three of these critical performance factors and are engineered for today s sterndrives, inboards and 2-cycle and 4-cycle outboards. The coated aluminum filter head is compact, and resist corrosion and features 1/4" or 3/8" ports. Its compact design, make it ideal for installations in space limited locations Ethanol-blended fuels hold more water and can increase the chances of water in fuel tanks, resulting in premature wear, poor performance and component damage. Sierra 7800 Series fuel filters are designed to successfully remove 99% of the emulsified water found in fuels. Contaminants can cause severe damage in close tolerance modern fuel pumps and injectors; Sierra filters have 90% efficiency rate of removing these harmful contaminates down to 21 mircons while maintaining fuel flow rates to meet the demands of modern high performance engines.