Large Five Layer Performance Air FilterMomentums innovative filter - to - housing interface was built to feature the largest air filter possible. This 7 - 12 tall 360 - degree radial flow air filter features a 3 - 12 flange and our pre - oiled Pro 5R media with five layers of progressively finer cotton gauze media for maximum performance. Our Pro 5R media provides your engine with the largest amount of high - flowing air, usually resulting in the highest power gains out of all our filter media options. This media is perfect for street andor track use. Its inverted top makes for more filter surface area, resulting in longer service intervals.Unique One - Piece HousingThe smooth one - piece sealed housing, constructed of heat - resistant cross - linked polyethylene (XLPE), features our patentedpatent - pending filter - to - housing interface. Its innovative design minimizes the total number of parts, making for an easy installation. A clear round sight window, resembling the VW logo, allows for hassle - free filter inspection without having to disassemble your system. The housing incorporates the OE air inlet and features an additional auxiliary air inlet that can be plugged if desired.Dyno - Tuned Intake TubeThis 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 ComponentsStainless - steel clamps and a silicone coupling are included for strength and durability, while also providing the most secure installation available. Momentum GT intakes are designed with fewer parts for a fast and easy installation.