Cross Linked XLPE Roto-molded Housing:, The one-piece sealed housing utilizes the all-new Injen Twist-Lock System to securely attach the 8-Layer Oiled Cotton Gauze air filter in place which eliminates the use of unnecessary parts and provides one of the simplest installations available. The EVO7104C housing also sports the all-new Injen Clear-View badge for a cleaner more aggressive under hood appearance.; Roto-molded Intake Tube:, The EVO7104C Evolution Air Intake System uses a custom designed and dyno-tuned, intake tube to produce huge power gains while retaining an OE quality fit. Injen also incorporated their internal MegaRam (MR) technology for safe and effective power gains without the fear of check engine lights.