ARLEN NESS 1010-3261 600-311 Big Sucker™ Stage 1 Air Cleaner Kit with Cover - Carbon - BlackFeatures All new next generation backing plate design Increases horsepower and torque Aluminum backing plate that features zero flat surfaces, every angle of the intake is designed to promote airflow One piece aluminum top filter place with integrated air venturi to direct airflow into the throttle body High performance filters are made from black pre oiled cotton for the best in airflow and filtration Filter is washable and reusable WARNING Exempt