NEW IN BOX FROM SUBARU, STI AIR CLEANER ELEMENT, DROP-IN REPLACEMENT AIR CLEANER ELEMENT ALLOWS A HIGHER VOLUME OF AIR FLOW VERSUS THE STOCK AIR FILTER. PAPER ELEMENT AND STEEL EMSH CONSTRUCTION DOES NOT REQUIRE OILING, REPLACES STANDARD ELEMENT 16546AA020, FITS IMPREZA WRX 2002-2007 AND WRX STI 2004-2007