Sierra 18-7865 Compact Water Separating Fuel Filter Sierras 10 micron filters are over 90 efficient at removing particles as small as 10 micron without starving your engine for fuel. 10 Micron rating Ethanol blended fuel absorbs more water and loosens more particulants than regular fuels Proper filtration is required for every horsepower engine Sierra fuel water separators remove over 98.8 of emulsified water from your gasoline All filters flow at 90 GPH to feed even the hungriest motor Intercha