Proprietary engineering processes ensure that all CV Drive Axles meet OE form, fit and function Neoprene boots are designed with additional bellows, when needed, to resist bellow stress and cracking, which is the leading cause of boot failure An axle retaining nut is supplied with every unit for a hassle-free installation, due to the likelihood that the original retaining nut is worn or stripped CV Drive Axle measurements are validated after assembly to ensure a proper fit; Threads are precision rolled to ensure proper fit when axle nut is installed Boot clamps are pneumatically crimped, creating a perfect seal between the boot and housing