Aluminum rear-front 1-piece suspension system holder was redesigned to allow mounting associated with the rear bulkheads into the owner for improved flex of the rear suspension system. The 1-piece holder is placed into the framework for a much better centering. A corner arm mounts had been redesigned to make use of the square composite bushings through the T4 and XB4 vehicles. The square eccentric bushings retain the vertical adjustment of this inner hinge pins from the past NT1s, but add the capability to adjust the pin width to expand the roll center and geometry corrections readily available for a corner suspension system. The holders will also be narrower that allows to install the hands more closer together to create more traction
