Redesigned front/rear diff bulkhead block set made from rigid & tough plastic composite has been strengthened for better bearing seating and improved stiffness of differential and pinion. The bulkheads are the mounting point for all suspension parts, and both housings include Labyrinth Dust Covers™ for the bearings to keep dirt out. The universal design allows the diff bulkhead block to be mounted both front and rear. Easy access to both front and rear differentials makes maintenance super easy. Fits XB808.