mx5cartalk.com

they are a hub kit

if you can source some RX8 hubs, they bolt straight up and are much stronger

As Regie said, get the RX-8 hub but it must be the later model RX-8 after 2009 for the ABS sensor connection to match.

The hub is a full sealed unit so you can't change the bearings and from personal experience, DON'T get an after market hub. I had ABS and fitment problems with the two I tried.

Read all about it in this post: viewtopic.php?f=79&t=60644