STAGE 4 - BILLET DIFF (SPOOL)
 
Run Rear  Axles in your Front X3 Smartlock Diff
SPOOL - FULLY LOCKET AT ALL TIMES
Much Larger FORGED Ring and Pinion
Tapered Roller Pinion Bearings
Billet Case + Side Cover
Internal Oil Pump
Adjustable Backlash + Bearing Preload (Shims included)
GEN II (Narrower Spool) suits 2018 and later X3
 
Requires Driveshaft to be shortened and 1310 Uni Joint Yoke to be welded to OEM driveshaft
 
Allow 3-5 Business Days for assembly/export packing  before shipping