Redesigned super-strong FRONT bulkheads are narrower to go the arms more into centerline to create more traction and also to offer an improved selection of track width modification. The bulkheads have actually really a great fit on updated differential and they are reinforced to enhance the dependability. The XB4 bulkheads allow super-fast & effortless diff trade and servicing by dismounting just 4 screws through front side related to bulkhead and base related to framework. This super-fast diff access is available at both front & rear. The bulkheads have minimized ball-bearing play, causing increased gear teeth lifespan and minimized gear stripping.