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 thanks to the massive built - in air scoop. A large clear sight window allows for filter inspection without removal of the air box. The roto - molded housing is made out of black cross - linked polyethylene. (US PAT 9440175) For Filter - to - Housing Interface. 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 intake system utilizes a pre - oiled, large, 7 - 12 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.