Volant 358531 Cold Air Intake Kit Incl. Closed Filter Box w/RAM Air Scoop/Air Duct/Pro5 Filter/Connectors/Clamps Cold Air Intake Kit Conventional cellulose fibers are larger than Ultra-Web nanofibers, and have larger spaces between the fibers, causing contaminant to load in the depth of the media and plug the airflow path Ultra-Web nanofibers have submicron diameters and small inter fiber spaces, which result in more contaminant being captured on the surface of the media and lower restriction. Premium hardware, Silicone Connectors Custom Formed Air duct Industry Leading Filtration Technology