FBO 60357 FBO-14 Replacement Silicone Treated / Prefilter Cartridge. Parker Racor FBO 60357 is 10 micron Filter Silicone Treated / Prefilter Cartridge for FBO 14. Silicone treated fuel filters remove particle contaminants down to one micron. Silicone filters can also be used upstream, before a fuel filter/water separator, to extend filter life.