The aFe MagnumFORCE Intakes Stage-2 PDS AIS PDS BMW Z4 3.0i (E85/E86) 06-08 L6-3.0L is a performance air intake system designed to provide maximum horsepower and torque gains for your BMW Z4 3.0i. This intake system features a Pro Dry S air filter, a Pro 5 R air filter, a Pro Dry S air filter, and a Pro 5 R air filter. The Pro Dry S air filter provides superior filtration and air flow while the Pro 5 R air filter provides maximum air flow. The intake system also features a one-piece, roto-molded intake tube that is designed to reduce air turbulence and maximize air flow. This intake system also utilizes a velocity stack to further increase air flow and reduce turbulence. The intake system is constructed of high-quality materials and designed to provide maximum performance and reliability.