If you need to have an approved spark arrestor or your 2020-21 Gas Gas, then this is your End Cap. It's 1/2 decibal quiter than the stock End Cap and 3 oz lighter. Just re-use the stock screws and no driling of holes. We have a quiet insert sold separatley for $9.95     This fits USA and CANADA modles only. For Euro or Aus, use that model