aFe MagnumFLOW Air Filters IAF P5R A/F P5R 3-3/4F x 6B x 4-3/4T x 5H Cooling>Water Pumps E85 Compatible

E85 Compatible

Suitable for installation in any chassis

This air intake system was developed to accommodate the engine's factory emissions control devices including the mass air flow sensor and engine vent lines

tuned and dyno-tested to fit specific Subaru WRX STI models

Internal check valve

aFe MagnumFLOW Air Filters IAF P5R A/F P5R 3-3/4F x 6B x 4-3/4T x 5H Cooling>Water Pumps E85 CompatibleConstructed with 100 percent polyurethane on top and bottom, this high flow, oiled performance filter is our highest flowing media for improved horsepower and torque. Five layers of progressively finer mesh cotton gauze media provide maximum airflow for best performance results. Washable and reusable for multiple cleaning cycles, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings.