Front & straight back bulkheads work a horizontal split design (HS) to retain effortless diff access while like valuable brand-new diff height modification. The first design connected to bulkheads makes use of an inline bushing to alter the placement and height linked to bevel drive gear. And accommodating the diff height alterations, moreover enables leading main driveshaft to work with with a diminished angle at a diminished expense friction and make use of in CV joint elements and improved driveline effectiveness. The XB4 bulkheads enable effortlessly differential access for setup adjustments or servicing by reducing just 4 screws through top gear industry target even though reduced area continues to be setup towards the framework. This super-fast diff access is showcased on both front and straight back gearboxes. The super-strong, narrow bulkheads give you the necessary approval the redesigned suspension system system holders with an increase of set-up range possibilities. Fits XB4'21