Momentum HD Intake Features: Unique One-Piece High Quality Housing w/ Auxiliary Scoop: The smooth one-piece high quality sealed housing with auxiliary air scoop is used to eliminate the use of multiple-piece housings and ensure the coolest air intake charge available. A large, clear sight window is used for a hassle-free filter inspection and an aggressive style. A urethane plug is also included if you wish to block off the auxiliary air inlet. (US PAT 9440175) For Filter-to-Housing Interface. High Quality Tube: This system uses a high quality, dyno-tuned intake tube to achieve maximum power gains while maintaining a perfect fit. A thin-walled aluminum tube section provides the largest cross section possible to achieve the maximum volumetric flow rate into the turbo adaptor. Huge 5- Layer Performance Air Filter: The Momentum HD intake is designed around an oil-free, large 9" round 360 degree radial flow performance air filter with 5-layers of progressive finer mesh cotton media providing maximum airflow and performance. The unique air filter to housing interface allows for maximum filter size which increases the available air volume while simplifying the installation process. Premium Hardware: Premium stainless steel T-bolt clamps and a 3-Ply reinforced silicone coupler are used for strength and durability while also providing the most secure installation available. Momentum HD intakes are designed with fewer parts for a quick and simple installation. Momentum HD Dynamic Air Scoop Features: Lower Intake Air Temperature: Dynamic Air scoops lower intake air temperatures by forcing more cool air from the front grille area into the air intake auxiliary scoop. High Quality D.A.S Scoop: This Dynamic Air Scoop is constructed with roto-molded plastic and made from heat soak resistant material for greater strength and unique styling. Hassle Free Installation: All necessary hardware is included for an easy, hassle free installation. No cutting or drilling required