Smooth Stage 1 Big Sucker™, Chrome

Big Sucker™ Stage 1 air cleaners are engineered and proven to give your engine maximum airflow for more horsepower & torque. The patented hidden breather backing plate is o-ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system, eliminating the need for any external hoses or hardware Smooth Stage 1 Air Cleaner Cover  Increases Horsepower & Torque  Patented Hidden Breather Technology  Pre-Oiled & Synthetic High Performance Filters One-Piece Aluminum Backing Plate  Radius Air Inlet for Unobstructed Airflow   California Air Resource Board: Executive Order D-639-12