Wavetrac Evo 8/9 LSD Designed from a clean sheet using state-of-the-art knowledge and engineering to be a better differential than any other by using a patent pending design to improve grip in low traction conditions. Wavetrac limited slip differentials give you quicker acceleration and faster cornering by driving both drive wheels instead of just one. And, they offer improved no-load performance when compared to other helical gear differentials on the market. Features Innovative: Patent pending 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 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. Applications 2003-2007 Mitsubishi Lancer Evolution 8/9 What\’s in the box? 1 Wavetrac Differential Warranty Transferable, Limited Lifetime Warranty