The main benefit of a stub axle setup comes with giving you the ability to change a half shaft twice faster than oem. Often that`s crucial during races because a 5 min shaft swap might turn in to an hour because of an old hub spline or nut that got stuck. We have these available for the most popular 108 and 122mm CV joint sizes. NOTE: These stubs fit only 30z hubs (the so called big bmw hub splines). Feel free to email us with your desired chassis / knuckle combo. We make these custom with 1-2 weeks lead time.