aFe Power Magnum FORCE 51-10441 BMW 325i (E46) Performance Intake System (Dry, 3-Layer Filter) Outflows the factory intake by up to 71% . Produces an additional 4 horsepower and 5 lbs. x ft. torque 3-Layer non-oiled, washable synthetic media for the perfect balance of performance, protection and convenience 16 gauge, one-piece powder-coated heat shield Unique precision machined, billet aluminum 3-angle adaptor This product is 50-state legal for 2001-2003 models (CARB E.O Number D-550-3)