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K&N Drop In Panel Filter 08-15 WRX / 08-15 STI AEM Dry Flow Panel Filter 08-15 WRX / 08-15 STI PANEL FILTER FOR 2008-17 WRX/STI
Direct fit for your stock airbox Direct fit for your stock airbox Helps The Stock Air Box Breathe Better.
Cosworth Panel Air Filter 08-17 WRX / 08-17 STI CONE FILTER - 3.125" MOUTH 02-14WRX / 04-14 STI Perrin Replacement Filter 08-14 WRX / 08-17 STI
Superior Filtration. Helps Your Engine Breath Better. Replacement Fiter