Redesigned front/rear diff bulkhead block set made from tough, rigid composite material has been strengthened for better bearing seating and improved stiffness of the differential and pinion. The diff bulkheads fit the larger and stronger 13x20 diff case ball-bearings. The bulkheads are the mounting point for all suspension parts, and the housing includes Labyrinth Dust Covers™ to keep dirt out of the bearings. The universal design allows the diff bulkhead block to be mounted at either front or rear ends of the buggy. Easy access to both front and rear differentials makes maintenance super easy. Fits XB808.