Maxoo, F.Alonso - I'm pretty sure there Titanium Nitride coated shafts, same as the hingepins and shock shafts that you can get for the car.
However, I'm not sure there a proper Tam part, cause if you looks closely at the picture, you can see there is a spacer between the steering knuckle, and hex hub. Says to me that the axle is from something else... so maybe the whole of the dogbone/axle assembly has been retrofitted from another car...
F.Alonso is probably right that it's an alex racing bit though, I'm sure I remember reading somewhere that the shock shafts and hingepins are manufactured by them....
HiH
Ed