This product is using on the drive shaft. -unnecessary to separate the c. V joint while installing the c. V joint, only take 3 minutes to install. Fb-6927 universal c. V joint boot kit This product is using on the drive shaft. 1. Save time, low cost, and easy to install. 2. Suitable for all series of vehicles. 3. Unnecessary to separate c. V joint while installing the c. V joint boot, only take 3 minutes to install.