Redesigned front/rear diff bulkhead block set created from rigid & tough synthetic composite had been strengthened for better bearing sitting and enhanced stiffness of differential and pinion. The bulkheads would be the mounting point for many suspension parts, and both housings consist of Labyrinth Dust Covers™ the bearings to help keep dust away. The universal design allows the diff bulkhead block to be installed both front and rear. Comfortable use of both front side and rear differentials makes upkeep a breeze. Fits XB808.