aFe MagnumFLOW Air Filters PG7 A F 4in F x 6in B x 4 1 2 T x 8 1 2 H Maximize your engine's performance with aftermarket intake systems. aFe MagnumFlow For Pro Dry S Replacement Filter F (7x4.75) B (9x7 aFe MagnumFLOW Pro 5R Air Filter (6 x 4)in F x (8 1 2 x 6 1 2)in B x (7 aFe Direct Fit Magnum Flow Pro Guard 7 Air Filter (Semi Truck. With five layers of progressively finer mesh cotton gauze media between 100 percent polyurethane top and base, this high flow oiled conical performance filter provides excellent airflow for maximum horsepower and torque. Washable and reusable for multiple cleanings, the tall, open, evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Pliable polyurethane flange with integrated bumps insures tight, no leak seal over the life of the filter.