E8/9X & F Series BMW Wavetrac Differential Package

All E90 BMW applications with a welded ring gear are now able to be installed in house in 3-5 business days! No more waiting 3-4 weeks to get your differential back! The differential, stub shaft seals, and machine work is included in the package price.  • 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 transferable, Limited Lifetime Warranty.