Unique One-Piece High Quality Housing W/ Sight Window: 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. A large clear sight window allows for filter inspection without removal of the airbox. 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 auxiliary airbox. 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. This tube has a built-in resonance chamber to catch un-wanted air intake noises. Large 5-Layer Performance Air Filter: This sealed intake system utilizes a pre-oiled, large 6" tall conical inverted top 360 degree radial flow performance air filter with 5-layers of progressive finer mesh cotton media providing maximum airflow and performance. Premium Hardware: Premium hardware and clamp are used to securely mount the high flow air filter and the intake tube. This sealed intake system is designed with fewer parts for a quick and simple installation. Magnum FORCE Stage-2Si Cold Air Intake System w/ Pro 5R Media BMW M3 (E90/92/93) 08-13 V8-4.0L S65 BMW M3 (E90/92/93) 08-13 V8-4.0L (S65)