The U-bolt conversion kit replaces the yoke and changes the OEM Rzeppa CV flange with a standard CV cardan joint style yoke and U-bolt style connector. The conversion is not only stronger but makes u-joint changes easier after breakages.
The TeraFlex JK: Yoke U-Bolt Conversion Kit replaces the OEM Rzeppa CV flange with a standard 1310 CV cardan joint style yoke and U-bolt style connector to run a CV style (double cardan) driveshaft.