The FPG air cleaner series is a two-stage engine air cleaner operating in medium to heavy dust conditions. The FPG series offers improved reliability and durability with reduced weight and costs. Ever since Donaldson® developed the first air cleaner in 1915, we have worked closely with original equipment manufacturers to provide filtration solutions to meet changing design and specification requirements for diesel engines. Because they are made of injection molded high strength plastic, FPG air cleaners offer the flexibility to overcome space limitations for underhood air cleaners. Donaldson® employs innovative plastic materials and production techniques that result in air cleaners that are corrosion-free and lighter in weight than traditional metal air cleaners - yet without sacrificing sturdiness. Our extensive vibration testing reveals this to be a more durable design than most metal air cleaners. The filter inside the air cleaner is also quite different from the traditional design one-piece molded urethane endcaps encase the ends of the media and filter liners, eliminating the metal caps and plastisol potting compound that were traditionally used. The gluedon gasket found on axial filters is gone - now, the inside surface of the open end is actually the RadialSeal™ sealing surface.