Redesigned front/rear diff bulkhead block set made from rigid & tough plastic composite was strengthened for better bearing sitting and improved stiffness of differential and pinion. The bulkheads will be the mounting point for all suspension parts, and both housings include 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 access to both front side and rear differentials makes upkeep super easy. Fits XB808.