These inexpensive plastic throttle tubes are for use with motorcycles featuring Fly-By-Wire (a.k.a. Throttle By Wire or TBW) throttle control, such as all 2008 to present Harley-Davidson Touring, selected Softail CVO models, and all 2016 to present Softail. Simply replace your stock one piece grip and throttle tube with this and you can install any aftermarket grips you would like.