Large Five Layer Performance Air Filters:The 6-1/2” tall 360-degree radial flow air filters feature a 3-1/2” 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 track use.Unique One-Piece Housings:The smooth one-piece sealed housings, constructed of heat-resistant XLPE (cross-linked polyethylene) polymer, features our patent-pending filter-to-housing interface. Large, clear sight windows allow for hassle-free filter inspection, without having to disassemble your system.Dyno-Tuned Intake Tubes:This system features high quality, computer-designed, dyno-tuned intake tubes to achieve maximum power gains while maintaining a perfect fit. Made from XLPE material and high-performance silicone, the intake tubes provide heat-soak resistance and extreme durability.Hassle-Free Installation: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.Premium Components:Stainless-steel worm clamps are included for strength, and a premium bellows coupling allows for ample flexibility.