Don’t let a flimsy paper filter get between you and true performance. The PERRIN Performance™ dual stage, “Open Cell” foam, drop-in Panel Filter is the answer. Increases in horsepower are a simple easy install away! Quick cleans are simple with our aerosol cleaner and spray oil. PartNumber : paPSP-INT-110 Description : Panel Filter 2009 Subaru Forester XT H4.2458cc Air Filters::Air Filters - Drop In 2009-2010 Subaru Forester XT Limited H4.2458cc Air Filters::Air Filters - Drop In 2010-2012 Subaru Forester XT Premium H4.2458cc Air Filters::Air Filters - Drop In 2011-2012 Subaru Forester XT Touring H4.2458cc Air Filters::Air Filters - Drop In 2008-2014 Subaru Impreza WRX STI H4.2458cc Air Filters::Air Filters - Drop In 2011-2014 Subaru Impreza WRX STI Limited H4.2458cc Air Filters::Air Filters - Drop In 2010 Subaru Impreza WRX STI Special Edition H4.2458cc Air Filters::Air Filters - Drop In