Front side anti-roll bar for ball-bearing roll club mounting system and redesigned to utilize the X4 front suspension arms. The anti-roll club system is installed to your front side bulkheads via bearings from outside for extra-smooth motion and for fast & simple changes and adjustment. The roll bar turns in ball-bearings for maximum precision and free movement. Anti-roll bar height is adjustable via a screwââ¬Â¦ fast & simple. Anti-roll club has laser-engraved stripes (corresponding to bar thickness) for simple identification.