Note: For Mainland China: Retrofitting not following GA-801 2019 is only allowed for use on race-track and not for use on public roads according to the relevant retrofitting regulation. For G80, G82, G83 Air Breather, Side Sill Attachments and Rear Spoilers do not follow GA-801 2019. 4' G82 M4, 4' G83 M4.