Wavetrac Diff - BMW E38/E39/E46/E60/E90/F21 DIESEL (215K) BOLTED OEM RING GEARS r=2.35-2.81 including:

• Innovative:
Patented Wavetrac® design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing diff design.

• Superior Materials:
9310 steel gears run in case-hardened billet or forged steel bodies. ARP® fasteners used throughout.

• Maintenance Free:
As supplied new the Wavetrac® differential will perform a lifetime of service without maintenance or rebuilds.

• Customizable:
If desired you can alter the diff’s behavior to suit your needs using optional components.

• Limited LIFETIME Warranty:
All Wavetrac® differentials include a Limited Lifetime Warranty.