Maximum performance within minutes is what this aFe Stage 1 cold air intake system delivers. Enclosed in a durable 16 gauge heat shield; a massive washable/reusable; 360 deg. conical Pro 5R air filter increases airflow resulting in an additional 6 hp; and 7 lbs./ft/ torque. This intake system also features a unique 3-angle adaptor for increased air velocity. The Pro 5R air filter is constructed with 100 percent polyurethane for long life and multiple cleaning cycles. This intake is the easiest intake on the market to install. Simply remove the factory intake and mount the 3-angle adaptor with the air filter to the MAF sensor tube and you are breathing more air and producing more power. Magnum FORCE Stage-1 Cold Air Intake System w/ Pro DRY S Filter BMW 545i (E60)/645i (E63/64) 04-05 V8-4.4L N62 BMW 545i (E60)/645i (E63/64) 04-05 V8-4.4L N62