You can't win if you do not finish. In mild applications stock C.V joints are fine. If you have a high performance engine or go off-road then step up with our conversion flanges and stub axles. Rugged terrain usage and race applications require the use of our race hardened C.V. components as well. Manufactured by EMPI and hardened for superior strength, these Races and Cages hold up under the most demanding conditions. Cages and Races are designed for EMPI C.V. Joints. For 7/8" (.875") Balls, (Can also be used with .874" balls). Fits all EMPI C.V. Joints for 930, Each