aFe MagnumFLOW Air Filters OER P5R A/F P5R Nissan 370Z 09-11 V6-3.7LConstructed with 100% polyurethane on all four sides, this high flow, oiled OE replacement performance filter will outflow the stock filter by up to 16% for improved horsepower and torque. The Pro 5R air filter uses five layers of progressively finer mesh cotton gauze media to provide maximum airflow for best performance results. Washable and reusable for multiple cleaning cycles, the tall, open, evenly spaced pleats provide excellent dust holding