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The aFe MagnumFLOW P5R Pro DRY S drop-in air filter for Subaru applications (Forester, Impreza, Outback, WRX, STI 2008–2019; Impreza WRX STI 2008–2011 noted) replaces the OE element with a washable, reusable dry-media design. Its three-layer progressive synthetic media and tall pleats boost dust-holding capacity and service life. A 100% polyurethane boxed frame and integrated urethane bump seal ensure a tight, leak-free fit across repeated cleanings.
aFe MagnumFLOW Air Filters OER PDS A/F PDS Subaru Impreza WRX STI 08-11 H4-2.5L
