Quaife part number : QDF9H. The Quaife ATB Helical LSD differential never locks harshly with a set pre-load of wheel slip across the driven axle, like a conventional LSD. The Quaife ATB Helical LSD differential automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree, and never locks.
Good diff, yes there are more purposeful diffs (plated) but for occasional track days and twisty b roads it's great. Pulls you out of a corner without losing too much traction or wheelspin, certainly notice the difference. Fitted to a Peugeot 205 Xs with a MA gearbox