The Do-Luck rear ladder bar helps to stiffen the 240sx chassis. From Do-Luck Japan translated by google: As you pursue the speed of under all circumstances, important point comes into view in more power. It body rigidity. This force transmitted from the input and the drive wheels from the not firmly road, because the twisting and body, such as by centrifugal force generated during cornering, not expected exact suspension stroke. Certainly rigidity of the suspension mounting portion is improved on the front rear strut tower bar. But it just plays a surely rigidity up even while ensuring occupant space of REAR CROSS BAR (rear crossbar) rear seat to allow the rigidity of the body center that can not be resolved, mounting also quite simple. This direct feeling is, to what high-level driver that had to know that you control, I want you to taste.