Wavetrac Differential - Wavetrac ATB LSD Built Differential for 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

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.