FHPI air cleaner has dual layers of micro density foam to help provide maximum air filtration for extended engine life, even in dusty conditions. The filter element size has been increased, which helps extend the time between routine filter cleanings The design allows access for cleaning without removing the filter from the engine, which makes disassembly, cleaning, and reassembly a snap . The inner filter comes pre-oiled and ready to use right out of the package. This product includes aAir filter. 90 degree elbow tube. 45 degree elbow tube. Allen Wrench. (2) Zip ties and instructions.