Backside anti-roll club for ball-bearing roll bar mounting system and redesigned to do business with the X4 back suspension system arms. The anti-roll club system is mounted towards the rear bulkheads via bearings from outside for extra-smooth motion as well as for quick & simple changes and modification. The roll bar turns in ball-bearings for optimum precision and free motion. Anti-roll bar height is adjustable via a screwââ¬Â¦ fast & effortless. Anti-roll bar has laser-engraved stripes (corresponding to club thickness) for easy recognition.