The new motorsports hub is made from a superior alloy compared to stock. It has a thicker flange and all of the high stress areas of the OEM hub have been refined resulting in an end result that is easier to install, and stronger.
The motorsports hub uses the OEM RX8 bearing and axles.
Price is for (1) rear hub which does not include the bearing. If you need bearings, you add them from the drop down list of options.