Want more power out of your N55 The Momentum GT Pro Dry - S Cold Air Intake is the best system for creating power, airflow, and maximizing performance. This system provides a 16 air - flow increase over stock, allowing the car to breathe to its best ability. The Pro DRY S Filter is made of a 3 - layer synthetic media, providing additional air flow and filtration. The Pro DRY S is convenient, as it requires no re - oili ng when being cleaned. Unique One - Piece High Quality Housing A custom CAD designed roto - molded housing made from heat soak resistant material eliminates the use of multiple components and ensures the coolest air intake charge available. The roto - molded housing is made out of black cross - linked polyethylene. A urethane plug is also included if you wish to completely seal the air box. High Quality Tube This system uses a high quality plastic CAD designed, dyno - tuned, roto - molded intake tube to achieve maximum power gains while maintaining a perfect fit. Large 3 - Layer Performance Air Filter This Momentum GT intake system was designed around the largest filter possible to allow maximum performance and filtration. This cylindrical filter has a large oval (6 - 34 x 4 - 34) flange and is 9 tall inverted top Pro DRY S filter media. The Pro DRY S performance air filter features 3 - layers of progressive finer porosity synthetic media providing maximum convenience with 100 polyurethane frame for long life and multiple cleaning cycles. Premium Hardware Premium stainless steel clamps and a silicone coupling are used for strength and durability while also providing the most secure installation available. Momentum GT intakes are designed with fewer parts for a quick and simple installation.