New Kawasaki Ninja 300 / 300 ABS Billet Aluminum Emission Smog Block Off Plate Made of Heat Treated (Billet) Aluminum [6061-T6]. Manufactured using 100% CNC Machining. No Casting or Molding are involved in the Manufacturing Process. Finished with Gold Anodize Coating. Removes the smog system which eliminates error when making air/fuel ratio measurements Essential when DYNO tuning your motorcycle. Improves exhaust scavenging. Easy installation (reuses your stock screws). This item comes with: (1) Emission Block-Off (only one is needed for this motorcycle).