I have warn 27 spline hubs on my cj5, warn discontinued these, they were part of a conversion kit. I ordered these 19 spline hubs and swapped parts to make my 27 spline hubs new again.All warn premium hubs have the same internals as long as they are the same style i.e. for a dana 44 axle. I hope this helps someone. Warn was no help here, I asked this question directly to their customer service and they would answer, told me to buy the whole kit again from one of their vendors.