Aluminum rear-front 1-piece suspension system holder was redesigned allowing mounting of rear bulkheads into the holder for improved flex associated with back suspension system. The 1-piece holder is placed in to the chassis for a much better centering. A corner arm mounts were redesigned to make use of the square composite bushings through the T4 and XB4 vehicles. The square eccentric bushings retain the vertical adjustment of the inner hinge pins through the past NT1ââ¬â¢s, but include the capacity to adjust the pin width to grow the roll center and geometry changes readily available for the rear suspension. The holders are narrower which allows to mount the hands more closer together to build more traction. Ebony color.