This 9 tall 360-degree radial flow air filter features a 5-1/2" flange and our oil-free Pro DRY S media with three layers of synthetic media for maximum convenience. Its progressive layering provides great filtration efficiency and dust holding capacity, while not requiring the use of oils. This media is best suited for street use. Its inverted top makes for more filter surface area, resulting in longer service intervals. The included massive air filter is surrounded by an open-element XLPE (Cross-linked Polyethylene) polymer housing that minimizes warm engine air for maximum performance. Its open design allows for easy viewing of the air filter, and an aggressive air intake sound. The built-in air intake scoop captures cold air directly from the top of the radiator support thanks to its huge opening. The lightweight tube is computer-designed to achieve maximum power gains while maintaining a perfect fit. Manufactured from 100% twill weave carbon fiber, it features zero fiberglass and is clear-coated for the highest quality construction. The computer designed system utilizes factory mounting locations, minimizing the use of unnecessary hardware and 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. Stainless-steel clamps are included for strength, and premium silicone couplings allow for ample flexibility. Track Series intakes are designed with fewer parts for a fast and easy installation.