Cardone 66-2103 New CV Axle Neoprene boots designed w/ additional bellows where necessary to reduce stress and ozone cracking Threads and splines are precision rolled for hassle-free replacement 3% moly grease provides excellent high temp characteristics for longer life and better wear Transmission seal diameter is precision machined after heat treatment to ensure correct surface finish, promoting long seal life CV Drive Axle measurements are validated 100% after assembly to ensure a proper fit. Boot clamps are pneumatically crimped creating a perfect seal between the boot and housing.