I bought this front one-way for my TA06 for drift proposes. The one-way diff allows you to do tight turns while drifting at low speeds. It makes it a lot easier to drift around tight bends using the brake, acting similar to a handbrake/ e-brake in a real car.
Initially the car would spin out and oversteer too much, but reducing the maximum brake force of my ESC down to 50%, it is now easily controllable.
The one-way also comes with two small red spacers that go in the axle cups. They cause too much binding with the stock CVD axles. I left them out.
Gear ratios remain the same, as stock front gear diff is also 39T.