Specially designed High Performance washable Air Filter. This filter has a proprietary sealing design. The softness of the urethane allows the filter to create its own gasket. The materials are depth loaded technology allowing for more dust to load the filter surface and not to impede the flow like "traditional" washable filters. Contains galvanized expanded metal to allow maximum compression with crushing the element. Greatly reduces engine wear.
this DOES fit the HMS lids and bases the adds 1 inch to filter height so a 4" is really 5" overall
