BMW F20 F21 F22 F23 F34 M135i M140i M235i M240i 340i Wavetrac ATB LSD

The Wavetrac ATB LSD replaces the open diff in F20/F21 M135i & M140i, F22/F23 M235i & M240i, and F34 340i models with 215K 3.08 final drive axles. It’s a true bolt-in fit - no modifications needed.

Unlike Quaife or Torsen units, its wave-gear design maintains drive to the loaded wheel even when the other lifts - critical for UK B-road grip and track-day consistency.

• 9310 steel gears and billet steel housing built for fast-road or track-day use
• Carbon fibre bias plates deliver stable torque bias from day one to 100k miles
• ARP fasteners, silent operation, fully compatible with factory traction control
• No setup, no maintenance, no clutch chatter - just predictable, progressive grip