Large Five Layer Performance Air Filter: Momentum’s innovative filter-to-housing interface was built to feature the largest air filter possible. This 9” tall 360-degree radial flow air filter features a 7" x 4-3/4" 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 and/or track use. Its inverted top makes for more filter surface area, resulting in longer service intervals, while its expanded metal provides impact protection. Unique One-Piece Housing: The smooth one-piece sealed housing, constructed of heat-resistant cross-linked polyethylene (XLPE), features our patented (US PAT 9440175) filter-to-housing interface. Its innovative design minimizes the total number of parts, making for an easy installation. A large, clear sight window allows for hassle-free filter inspection, without having to disassemble your system. Its auxiliary air inlet can be used to bring in additional air, or can be closed with an included plug. Dyno-Tuned Intake Tube: 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. Premium Components: Momentum GT intakes are designed with fewer parts for a fast and easy installation. This is a direct fit intake system that utilizes factory mounting points and requires no cutting or modifications. All necessary T-bolt clamps, couplings, and hardware are included. Emissions Disclaimer: This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.