Wavetrac Diff - F Series M135i & More with 215K 3.08 Final Drive Axle F20/F21 M135i F20/F21 M140i F22/F23 M235i F22/F23 M240i F34 340i -

• 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.