Black anodized Knuckle billet outer cover. Cotton gauze high flow air filter element pre-oiled with black oil. This is a Stage 1 performance air cleaner kit for M8 models. Perfect for those that think stock is not good enough. Offers easy bolt-on installation and improved looks. Patent-Pending backing plate design is built for maximum airflow velocity; resulting in increased horsepower and torque throughout the RPM range. - Increases Horsepower & Torque over stock - Pre-oiled high-flow air filter element - Filter top plate with integrated filter mounting features & an air venturi - Integrated smooth radius air inlet starts at the edge of the air filter and ends at the mouth of the throttle body - The filter ring design covers the urethane edge of filter when installed for a clean look - Accepts all Arlen Ness® Stage 1® outer covers.