aFe MagnumFLOW Air Filters OER PDS A/F PDS Subaru Impreza WRX STI 08-11 H4-2.5L

Constructed with 100-percent polyurethane on top and bottom, this high flow oil-free OE replacement performance filter will outflow stock paper filter for improved horsepower and torque. Two layers of progressively finer mesh synthetic media provide maximum convenience and easy maintenance. Washable and reusable for multiple cleaning cycles, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Integrated urethane bump seal insures tight, no leak seal over the life of the filter.