there is only one kit efrain, Every truck seemed to be a touch different from wear, so Razors edge made sure to make them all fit tight, you may on some have to give it some "persuasion" by lightly tapping it thru the spindle, if they had made them to 'drop in' on all years then they would have been loose, causing even more wear to the spindle. We have installed about 7-8 so far, some drop in , most we have to put some effort into the install, this way you get no slop or play.