aFe Momentum GT Cold Air Intake System Audi A4 (B9) 17-23 L4-2.0L (t)

Large Three Layer Performance Air Filter:Momentum’s unique filter-to-housing interface was built to feature the largest air filter possible. This 6” tall 360-degree radial flow air filter features a 4-1/2" 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. Unique One-Piece Housing:The sealed heat-resistant housing, constructed of XPLE (cross-linked polyethylene) polymer, features our patent-pending filter-to-housing interface and a clear sight window that allows for hassle-free filter inspection. An aluminum heat shield panel on the side of the housing deflects hot air emitted from the turbocharger, ensuring the system’s two air inlets bring in the coolest air possible. In additio