This 7” tall 360-degree radial flow air filter features a 4” round flange and our oiled Pro 5R media with five layers of progressively finer cotton gauze media for maximum airflow and performance. This media is best for street and/or track use. The included performance air filter is surrounded by an open-element cross-link polyethylene (XLPE) polymer housing that minimizes warm engine air for maximum performance. Its open design allows for easy viewing of the air filter, yet creates a heat-blocking seal when the vehicle’s hood is closed. It connects to the vehicle’s factory air inlet with no additional hardware. This system features a high quality, computer-designed, dyno-tuned intake tube to achieve maximum power gains while maintaining a perfect fit. Its XLPE material is heat-soak resistant and extremely durable. This intake is designed to use factory mounting locations, minimizing the use of unnecessary hardware, ensuring a perfect fit every time. Its innovative design makes for a hassle-free, direct bolt-on installation process that requires no cutting or drilling. Its revolutionary design, featuring our patent pending filter-to-housing interface uses half the number of parts of a traditional cold air intake system. Fits both active and non-active steering. Magnum FORCE Stage-2 Cold Air Intake System w/ Pro 5R Media BMW 128i/325i/328i/330i (E82/88/90/91/92/93) 06-13 L6-3.0L N52 BMW 128i/325i/328i/330i (E82/88/90/91/92/93) 06-13 L6-3.0L N52