Run Rear  Axles in your Front X3 Smartlock Diff
BIlet Side Covers - Massive Tapered Roller Bearings
Adjustable Backlash + Bearing Preload (Shims included)
500% More Carrier Support
Ring Gear Load Bolt - Reduces Ring Gear Deflection
KING OF HAMMERS WINNER 2026
Add Pinion Saver at Checkout for 600% More Pinion Support
 
TWO SPOOL OPTIONS:
 
1 - GEN II (Narrower Spool) suits 2018 and later X3
2 - EXTREME SPOOL REQUIRES OEM RING GEAR BORE TO BE MACHINED LARGER
 
For Custom Colors, please contact us.