Want more power out of your N55? The Momentum GT Pro 5R Cold Air Intake is the best system for creating power, airflow, and maximizing performance. This system provides a +26% air-flow increase over stock, allowing the car to breathe to its best ability. The Pro 5R filter consists of an oiled 5-layer mesh cotton gauze media for maximum performance and filtration. The Pro 5R maintains a 98.6% efficiency rating, allowing high air flow and optimal performance even when dirty. 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 5-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 (6-3/4" x 4-3/4") flange and is 9" tall inverted top Pro 5R filter media. The Pro 5R performance air filter features 5-layers of progressively finer mesh cotton gauze oiled media and is constructed 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. Momentum GT Cold Air Intake System w/ Pro 5R Media BMW 335i/xi (E9x) 11-13 L6-3.0L (t) N55 BMW 335i/xi (E9x) 11-13 L6-3.0L (t) N55