Redesigned front/rear diff bulkhead block set created from rigid & tough synthetic composite have now been strengthened for better bearing sitting and enhanced tightness of differential and pinion. The bulkheads will be the mounting point for all suspension system system elements, and both housings contain Labyrinth Dust Covers™ the bearings to keep dirt away. The universal design permits the diff bulkhead block to be set up both front side and rear. Comfortable usage of both front side and back differentials makes upkeep a piece of cake. Fits XB808.