Lower bulkhead with anti-roll bar mounting areas, fits front L and back R part. Redesigned to work well with the long arms and narrower suspension system holders. The bulkheads function a super low anti-roll bar mounting place that allows the anti-roll bar cable to be placed under the drive shafts to somewhat lower the CG. The bulkheads function 1mm milled grooves for the ball bearing hubs to move the bulkheads 1mm nearer to the chassis center line from each part. Additional cut-outs were added for additional clearance to maneuver the inner suspension system pins closer to the center line to give you maximum traction, steering, and balance. Produced from premium Swiss 7075 T6 aluminum, black colored anodized.