Bulkheads are refined with improved rear arm approval with all the high roll center roles without back arm modification. Bulkheads were entirely redesigned to utilize the long hands and narrower suspension system holders. The bulkheads function an excellent low anti-roll club mounting place which allows the anti-roll club cable to be placed directly under the drive shafts to dramatically lower the CG. The bulkheads function 1mm milled grooves for the ball bearing hubs that moved the bulkheads 1mm nearer to the framework center line from each side. Produced from premium Swiss 7075 T6 aluminum, black anodized.