Redesigned front/rear diff bulkhead block set created from tough, rigid composite material. Strengthened for better bearing seating and enhanced tightness of this differential and pinion. The bulkheads would be the mounting point for all suspension system components. The universal design permits the diff bulkhead block become mounted at either front or rear from the automobile. Comfortable access to both front side and rear differentials makes upkeep quite simple. Fits XB808.