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 and delivers an aggressive Air Intake sound. 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 revolutionary design, featuring our patent pending filter-to-housing interface, uses half the number of parts of a traditional cold air intake system. A specially designed bellows coupling is included with this kit to ensure the perfect seal and fitment to the factory throttle body. Throttle body spacer 46-31011 will fit with this air intake system. Fits both active and non-active steering.