Front HS bulkheads enable diff height adjustment utilizing eccentric bushings. Into the front gearbox, the diff height has a 2mm modification range by which 3 Dot is for lowest diff position. The diff height modification is a vital set-up ability that enables quick set-up adaption for either Carpet or Dirt tracks. You can find 3 various angle configurations for adjustment for the front drive train. Carpet version operates with lower ride height and to keep carefully the drive shafts straight the differential is put in upper position. Dirt edition operates with top trip height also to keep consitently the drive shafts directly the differential is put in reduced place. Fits XB4'21
