This 9 tall 360 - degree radial flow air filter features a 5 IN flange and our pre - oiled Pro 5R media with five layers of progressively finer cotton gauze media for maximum performance. It provides your engine with the largest amount of high - flowing air and delivers the highest power gains in most cases. This media is perfect for street andor track use. 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, yet creates a heat - blocking seal when the vehicles hood is closed. It utilizes the vehicles OE 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. 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. Its revolutionary design, featuring our patent pending filter - to - housing interface, uses half the number of parts of a traditional cold air intake system.