Originally Posted by RC America

The XB4 includes the adjustable, aluminum hinge pin holders pictured in the web presentation, no extra purchase needed. And I wouldn't expect an aluminum steering rack to be needed given their plastics. If customers request aluminum hubs, they may look to offer them, but I have not seen any mention yet.

From what I have seen, the only 'extras' to purchase will be tuning options (springs, sway bars, shock/diff oil). It should be ready to go out of the box!

- Bryan