The aFe MagnumFORCE Intakes Stage-1 P5R AIS P5R BMW 525i/528i (E39) 97-03 L6-2.5L/2.8L is a performance air intake system designed to boost the power and torque of your BMW 525i/528i (E39) 97-03 L6-2.5L/2.8L engine. It features a one-piece sealed housing with a Pro 5R air filter to provide maximum airflow and increased horsepower and torque. The intake also features a heat shield to reduce intake temperatures and a pre-oiled, washable/reusable air filter for maximum convenience. The intake is easy to install and comes with all necessary hardware and detailed instructions.