Wavetrac 40.309.175WK LSD Audi S4 (B6/B7) 4.2 with 03A gearbox 4WD (front)

For: Audi S4 (B6/B7) 4.2 4WD with manual 6-speed 0A3 gearbox

Wavetrac^® designed from a clean sheet using state-of-the-art knowledge and engineering to be a better differential than any other. It uses a patented design to improve grip in low traction conditions.

Wavetrac^® gives you quicker acceleration and faster cornering by driving both drive wheels instead of just one. And, it offers improved no-load performance when compared to other helical gear differentials on the market.

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.