ORIGINAL: sparky 25
Those cups in the picture are stock hpi Baja cups with a hardened steel band slid over them,
My xs cups don't even look used yet and being the ss it's has cvd's at the wheels,
If the cups are breaking on the xs, an after market company would make some easy money providing cups with the steel bands in place.
If they had those cups for the output of the tranny, and made cvd's for the inner and outer axles, i would definitely spend the money