BMW 168mm Limited Slip Differential Rebuild Kits – E21, E30, E36, Z3 (Pre-1999 4-Cylinder Models)

Restore and enhance the performance of your BMW’s 168mm small-case limited slip differential. Specifically engineered for most 4-cylinder BMW models before 1999, including E21, E30, E36, and Z3.

Available Kits:

• Service Pack:
  • 2-clutch set for OEM-like differential response and feel.
• Stage 1 – Track Pack:
  • 2-clutch set with RacingDiffs’ high-durability clutch plates.
  • Precision billet steel cap for added strength.
  • Ramp saver shim for extended differential lifespan.
• Stage 2 – Race Pack:
  • 4-clutch set with RacingDiffs’ enhanced clutch plates for increased locking and performance curve.
  • Pre-load shim set for precise engagement.
  • Billet steel cap for superior rigidity.
  • Ramp saver shim and pre-load shim set for improved handling and lock precision.
• Stage 3 – Max Performance Pack:
  • 4-clutch set with RacingDiffs’ premier clutch plates.
  • Ultra-durable billet steel cap.
  • Pre-load shim set.
  • Multi-variation ramp set for customizable differential lock behavior and power distribution.

Complete Rebuild: For a full differential overhaul, add the Bearing & Oil Seal Set (sold separately).

OEM Part Numbers Supported:
33141203806, 33141203803, 33141203804, 33141203805, 33141204153

Designed for enthusiasts seeking reliable, track-proven performance and precise differential control in classic BMW 4-cylinder models.